ElastiCache 使用示例 AWS CLI

以下代码示例向您展示了如何使用with来执行操作和实现常见场景 ElastiCache。 AWS Command Line Interface

操作是大型程序的代码摘录，必须在上下文中运行。您可以通过操作了解如何调用单个服务函数，还可以通过函数相关场景的上下文查看操作。

每个示例都包含一个指向完整源代码的链接，您可以在其中找到有关如何在上下文中设置和运行代码的说明。

主题

操作

操作

以下代码示例显示了如何使用add-tags-to-resource。

AWS CLI

为资源添加标签

以下add-tags-to-resource示例向集群或快照资源添加最多 10 个标签（键值对）。


aws elasticache add-tags-to-resource \
    --resource-name "arn:aws:elasticache:us-east-1:1234567890:cluster:my-mem-cluster" \
    --tags '{"20150202":15, "ElastiCache":"Service"}'

输出：


{
    "TagList": [
        {
            "Value": "20150202",
            "Key": "APIVersion"
        },
        {
            "Value": "ElastiCache",
            "Key": "Service"
        }
    ]
}

有关更多信息，请参阅 Elasticache 用户指南中的使用成本分配标签监控成本。

有关API详细信息，请参阅 “AddTagsToResource AWS CLI命令参考”。

以下代码示例显示了如何使用authorize-cache-security-group-ingress。

AWS CLI

为入口授权缓存安全组

以下authorize-cache-security-group-ingress示例允许网络进入缓存安全组。


aws elasticache authorize-cache-security-group-ingress \
     --cache-security-group-name  "my-sec-grp" \
     --ec2-security-group-name "my-ec2-sec-grp" \
     --ec2-security-group-owner-id "1234567890"

该命令不产生任何输出。

有关更多信息，请参阅 Elasticache 用户指南 ElastiCache中的亚马逊自助服务更新。

有关API详细信息，请参阅 “AuthorizeCacheSecurityGroupIngress AWS CLI命令参考”。

以下代码示例显示了如何使用batch-apply-update-action。

AWS CLI

应用服务更新

以下batch-apply-update-action示例将服务更新应用于 Redis 集群。


aws elasticache batch-apply-update-action \
    --service-update-name elc-xxxxx406-xxx \
    --replication-group-ids test-cluster

输出：


{
    "ProcessedUpdateActions": [
        {
            "ReplicationGroupId": "pat-cluster",
            "ServiceUpdateName": "elc-xxxxx406-xxx",
            "UpdateActionStatus": "waiting-to-start"
        }
    ],
    "UnprocessedUpdateActions": []
}

有关更多信息，请参阅 Elasticache 用户指南 ElastiCache中的亚马逊自助服务更新。

有关API详细信息，请参阅 “BatchApplyUpdateAction AWS CLI命令参考”。

以下代码示例显示了如何使用batch-stop-update-action。

AWS CLI

停止服务更新

以下batch-stop-update-action示例将服务更新应用于 Redis 集群。


aws elasticache batch-stop-update-action \
    --service-update-name elc-xxxxx406-xxx \
    --replication-group-ids test-cluster

输出：


{
    "ProcessedUpdateActions": [
        {
            "ReplicationGroupId": "pat-cluster",
            "ServiceUpdateName": "elc-xxxxx406-xxx",
            "UpdateActionStatus": "stopping"
        }
    ],
    "UnprocessedUpdateActions": []
}

有关更多信息，请参阅 Elasticache 用户指南 ElastiCache中的亚马逊自助服务更新。

有关API详细信息，请参阅 “BatchStopUpdateAction AWS CLI命令参考”。

以下代码示例显示了如何使用copy-snapshot。

AWS CLI

复制快照

以下copy-snapshot示例创建现有快照的副本。


aws elasticache copy-snapshot \
    --source-snapshot-name "my-snapshot" \
    --target-snapshot-name "my-snapshot-copy"

输出：


{
    "Snapshot":{
        "Engine": "redis",
        "CacheParameterGroupName": "default.redis3.2",
        "VpcId": "vpc-3820329f3",
        "CacheClusterId": "my-redis4",
        "SnapshotRetentionLimit": 7,
        "NumCacheNodes": 1,
        "SnapshotName": "my-snapshot-copy",
        "CacheClusterCreateTime": "2016-12-21T22:24:04.955Z",
        "AutoMinorVersionUpgrade": true,
        "PreferredAvailabilityZone": "us-east-1c",
        "SnapshotStatus": "creating",
        "SnapshotSource": "manual",
        "SnapshotWindow": "07:00-08:00",
        "EngineVersion": "3.2.4",
        "NodeSnapshots": [
            {
                "CacheSize": "3 MB",
                "SnapshotCreateTime": "2016-12-28T07:00:52Z",
                "CacheNodeId": "0001",
                "CacheNodeCreateTime": "2016-12-21T22:24:04.955Z"
            }
        ],
        "CacheSubnetGroupName": "default",
        "Port": 6379,
        "PreferredMaintenanceWindow": "tue:09:30-tue:10:30",
        "CacheNodeType": "cache.m3.large"
    }
}

有关更多信息，请参阅《Elasticache 用户指南》中的导出备份。

有关API详细信息，请参阅 “CopySnapshot AWS CLI命令参考”。

以下代码示例显示了如何使用create-cache-cluster。

AWS CLI

创建缓存集群

以下create-cache-cluster示例使用 Redis 引擎创建缓存集群。


aws elasticache create-cache-cluster \
    --cache-cluster-id "cluster-test" \
    --engine redis \
    --cache-node-type cache.m5.large \
    --num-cache-nodes 1

输出：


{
    "CacheCluster": {
        "CacheClusterId": "cluster-test",
        "ClientDownloadLandingPage": "https://console.aws.amazon.com/elasticache/home#client-download:",
        "CacheNodeType": "cache.m5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.5",
        "CacheClusterStatus": "creating",
        "NumCacheNodes": 1,
        "PreferredMaintenanceWindow": "sat:13:00-sat:14:00",
        "PendingModifiedValues": {},
        "CacheSecurityGroups": [],
        "CacheParameterGroup": {
            "CacheParameterGroupName": "default.redis5.0",
            "ParameterApplyStatus": "in-sync",
            "CacheNodeIdsToReboot": []
        },
        "CacheSubnetGroupName": "default",
        "AutoMinorVersionUpgrade": true,
        "SnapshotRetentionLimit": 0,
        "SnapshotWindow": "06:30-07:30",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Elasticache 用户指南》中的创建集群。

有关API详细信息，请参阅 “CreateCacheCluster AWS CLI命令参考”。

以下代码示例显示了如何使用create-cache-parameter-group。

AWS CLI

创建缓存参数组

以下create-cache-parameter-group示例创建了一个新的 Amazon ElastiCache 缓存参数组。


aws elasticache create-cache-parameter-group \
    --cache-parameter-group-family "redis5.0" \
    --cache-parameter-group-name "mygroup" \
    --description "mygroup"

输出：


{
    "CacheParameterGroup": {
        "CacheParameterGroupName": "mygroup",
        "CacheParameterGroupFamily": "redis5.0",
        "Description": "my group"
    }
}

有关更多信息，请参阅《Elasticache 用户指南》中的创建参数组。

有关API详细信息，请参阅 “CreateCacheParameterGroup AWS CLI命令参考”。

以下代码示例显示了如何使用create-cache-subnet-group。

AWS CLI

创建缓存子网组

以下create-cache-subnet-group示例创建了一个新的缓存子网组。


aws elasticache create-cache-subnet-group \
    --cache-subnet-group-name "mygroup" \
    --cache-subnet-group-description "my subnet group" \
    --subnet-ids "subnet-xxxxec4f"

输出：


{
    "CacheSubnetGroup": {
        "CacheSubnetGroupName": "mygroup",
        "CacheSubnetGroupDescription": "my subnet group",
        "VpcId": "vpc-a3e97cdb",
        "Subnets": [
            {
                "SubnetIdentifier": "subnet-xxxxec4f",
                "SubnetAvailabilityZone": {
                    "Name": "us-west-2d"
                }
            }
        ]
    }
}

有关更多信息，请参阅《Elasticache 用户指南》中的创建缓存子网组。

有关API详细信息，请参阅 “CreateCacheSubnetGroup AWS CLI命令参考”。

以下代码示例显示了如何使用create-global-replication-group。

AWS CLI

创建全局复制组

以下create-global-replication-group示例创建了一个新的全局复制组。


aws elasticache create-global-replication-group \
    --global-replication-group-id-suffix my-global-replication-group \
    --primary-replication-group-id my-primary-cluster

输出：


{
    "GlobalReplicationGroup": {
        "GlobalReplicationGroupId": "sgaui-my-global-replication-group",
        "GlobalReplicationGroupDescription": " ",
        "Status": "creating",
        "CacheNodeType": "cache.r5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.6",
        "Members": [
            {
                "ReplicationGroupId": "my-primary-cluster",
                "ReplicationGroupRegion": "us-west-2",
                "Role": "PRIMARY",
                "AutomaticFailover": "enabled",
                "Status": "associating"
            }
        ],
        "ClusterEnabled": true,
        "GlobalNodeGroups": [
            {
                "GlobalNodeGroupId": "sgaui-my-global-replication-group-0001",
                "Slots": "0-16383"
            }
        ],
        "AuthTokenEnabled": false,
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Ela sticache 用户指南》中的使用全球数据存储跨 AWS 区域复制。

有关API详细信息，请参阅 “CreateGlobalReplicationGroup AWS CLI命令参考”。

以下代码示例显示了如何使用create-replication-group。

AWS CLI

创建复制组

以下create-replication-group示例创建 Redis（已禁用集群模式）或 Redis（已启用集群模式）复制组。此操作仅对 Redis 有效。


aws elasticache create-replication-group \
    --replication-group-id "mygroup" \
    --replication-group-description "my group" \
    --engine "redis" \
    --cache-node-type "cache.m5.large"

输出：


{
    "ReplicationGroup": {
        "ReplicationGroupId": "mygroup",
        "Description": "my group",
        "Status": "creating",
        "PendingModifiedValues": {},
        "MemberClusters": [
            "mygroup-001"
        ],
        "AutomaticFailover": "disabled",
        "SnapshotRetentionLimit": 0,
        "SnapshotWindow": "06:00-07:00",
        "ClusterEnabled": false,
        "CacheNodeType": "cache.m5.large",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Elasticache 用户指南》中的创建 Redis 复制组。

有关API详细信息，请参阅 “CreateReplicationGroup AWS CLI命令参考”。

以下代码示例显示了如何使用create-snapshot。

AWS CLI

创建快照

以下create-snapshot示例使用 Redis 引擎创建快照。


aws elasticache create-snapshot \
    --snapshot-name mysnapshot \
    --cache-cluster-id cluster-test

输出：


{
    "Snapshot": {
        "SnapshotName": "mysnapshot",
        "CacheClusterId": "cluster-test",
        "SnapshotStatus": "creating",
        "SnapshotSource": "manual",
        "CacheNodeType": "cache.m5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.5",
        "NumCacheNodes": 1,
        "PreferredAvailabilityZone": "us-west-2b",
        "CacheClusterCreateTime": "2020-03-19T03:12:01.483Z",
        "PreferredMaintenanceWindow": "sat:13:00-sat:14:00",
        "Port": 6379,
        "CacheParameterGroupName": "default.redis5.0",
        "CacheSubnetGroupName": "default",
        "VpcId": "vpc-a3e97cdb",
        "AutoMinorVersionUpgrade": true,
        "SnapshotRetentionLimit": 0,
        "SnapshotWindow": "06:30-07:30",
        "NodeSnapshots": [
            {
                "CacheNodeId": "0001",
                "CacheSize": "",
                "CacheNodeCreateTime": "2020-03-19T03:12:01.483Z"
            }
        ]
    }
}

有关更多信息，请参阅《Elasticache 用户 ElastiCache 指南》中的 Redis 备份和恢复。

有关API详细信息，请参阅 “CreateSnapshot AWS CLI命令参考”。

以下代码示例显示了如何使用create-user-group。

AWS CLI

创建用户组

以下create-user-group示例创建了一个新的用户组。


aws elasticache create-user-group \
    --user-group-id myusergroup \
    --engine redis \
    --user-ids default

输出：


{
    "UserGroupId": "myusergroup",
    "Status": "creating",
    "Engine": "redis",
    "UserIds": [
        "default"
    ],
    "ReplicationGroups": [],
    "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:usergroup:myusergroup"
}

有关更多信息，请参阅《Elast icache 用户指南》中的使用基于角色的访问控制对用户进行身份验证 (RBAC)。

有关API详细信息，请参阅 “CreateUserGroup AWS CLI命令参考”。

以下代码示例显示了如何使用create-user。

AWS CLI

创建用户

以下create-user示例创建了一个新用户。


aws elasticache create-user \
    --user-id user1 \
    --user-name myUser \
    --passwords mYnuUzrpAxXw2rdzx \
    --engine redis \
    --access-string "on ~app::* -@all +@read"

输出：


{
    "UserId": "user2",
    "UserName": "myUser",
    "Status": "active",
    "Engine": "redis",
    "AccessString": "on ~app::* -@all +@read +@hash +@bitmap +@geo -setbit -bitfield -hset -hsetnx -hmset -hincrby -hincrbyfloat -hdel -bitop -geoadd -georadius -georadiusbymember",
    "UserGroupIds": [],
    "Authentication": {
        "Type": "password",
        "PasswordCount": 1
    },
    "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:user:user2"
}

有关更多信息，请参阅《Elast icache 用户指南》中的使用基于角色的访问控制对用户进行身份验证 (RBAC)。

有关API详细信息，请参阅 “CreateUser AWS CLI命令参考”。

以下代码示例显示了如何使用decrease-node-groups-in-global-replication-group。

AWS CLI

减少全局复制组中的节点组数量

以下方法使用 Redis 引擎decrease-node-groups-in-global-replication-group减少了节点组数量。


aws elasticache decrease-node-groups-in-global-replication-group \
    --global-replication-group-id sgaui-test \
    --node-group-count 1 \
    --apply-immediately \
    --global-node-groups-to-retain sgaui-test-0003

输出：


{
    "GlobalReplicationGroup":
    {
        "GlobalReplicationGroupId": "sgaui-test",
        "GlobalReplicationGroupDescription": "test",
        "Status": "modifying",
        "CacheNodeType": "cache.r5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.6",
        "Members": [
            {
                "ReplicationGroupId": "test-2",
                "ReplicationGroupRegion": "us-east-1",
                "Role": "SECONDARY",
                "AutomaticFailover": "enabled",
                "Status": "associated"
            },
            {
                "ReplicationGroupId": "test-1",
                "ReplicationGroupRegion": "us-west-2",
                "Role": "PRIMARY",
                "AutomaticFailover": "enabled",
                "Status": "associated"
            }
        ],
        "ClusterEnabled": true,
        "GlobalNodeGroups": [
            {
                "GlobalNodeGroupId": "sgaui-test-0001",
                "Slots": "0-449,1816-5461"
            },
            {
                "GlobalNodeGroupId": "sgaui-test-0002",
                "Slots": "6827-10922"
            },
            {
                "GlobalNodeGroupId": "sgaui-test-0003",
                "Slots": "10923-14052,15418-16383"
            },
            {
                "GlobalNodeGroupId": "sgaui-test-0004",
                "Slots": "450-1815,5462-6826,14053-15417"
            }
        ],
        "AuthTokenEnabled": false,
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Ela sticache 用户指南》中的使用全球数据存储跨 AWS 区域复制。

有关API详细信息，请参阅 “DecreaseNodeGroupsInGlobalReplicationGroup AWS CLI命令参考”。

以下代码示例显示了如何使用decrease-replica-count。

AWS CLI

减少副本数量

以下decrease-replica-count示例动态减少 Redis（已禁用集群模式）复制组中的副本数量或 Redis（已启用集群模式）复制组的一个或多个节点组（分片）中的副本节点数。此操作是在没有集群停机时间的情况下执行的。


aws elasticache decrease-replica-count \
    --replication-group-id my-cluster \
    --apply-immediately  \
    --new-replica-count 2

输出：


{
    "ReplicationGroup": {
        "ReplicationGroupId": "my-cluster",
        "Description": " ",
        "Status": "modifying",
        "PendingModifiedValues": {},
        "MemberClusters": [
            "myrepliace",
            "my-cluster-001",
            "my-cluster-002",
            "my-cluster-003"
        ],
        "NodeGroups": [
            {
                "NodeGroupId": "0001",
                "Status": "modifying",
                "PrimaryEndpoint": {
                    "Address": "my-cluster.xxxxx.ng.0001.usw2.cache.amazonaws.com",
                    "Port": 6379
                },
                "ReaderEndpoint": {
                    "Address": "my-cluster-ro.xxxxx.ng.0001.usw2.cache.amazonaws.com",
                    "Port": 6379
                },
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "myrepliace",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "myrepliace.xxxxx.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2a",
                        "CurrentRole": "replica"
                    },
                    {
                        "CacheClusterId": "my-cluster-001",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "my-cluster-001.xxxxx.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2a",
                        "CurrentRole": "primary"
                    },
                    {
                        "CacheClusterId": "my-cluster-002",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "my-cluster-002.xxxxx.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2a",
                        "CurrentRole": "replica"
                    },
                    {
                        "CacheClusterId": "my-cluster-003",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "my-cluster-003.xxxxx.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2a",
                        "CurrentRole": "replica"
                    }
                ]
            }
        ],
        "AutomaticFailover": "disabled",
        "SnapshotRetentionLimit": 0,
        "SnapshotWindow": "07:30-08:30",
        "ClusterEnabled": false,
        "CacheNodeType": "cache.r5.xlarge",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅 Elasticache 用户指南中的更改副本数量。

有关API详细信息，请参阅 “DecreaseReplicaCount AWS CLI命令参考”。

以下代码示例显示了如何使用delete-cache-cluster。

AWS CLI

删除缓存集群

以下delete-cache-cluster示例删除了之前配置的指定集群。该命令将删除所有关联的缓存节点、节点端点和集群本身。当您收到此操作的成功响应后，Amazon 会 ElastiCache 立即开始删除集群；您无法取消或恢复此操作。

此操作对以下情况无效：

Redis（已启用集群模式）集群作为复制组的最后一个只读副本的集群启用了多可用区模式的节点组（分片）来自 Redis（已启用集群模式）复制组的集群一个未处于可用状态的集群


aws elasticache delete-cache-cluster \
    --cache-cluster-id "my-cluster-002"

输出：


{
    "CacheCluster": {
        "CacheClusterId": "my-cluster-002",
        "ClientDownloadLandingPage": "https://console.aws.amazon.com/elasticache/home#client-download:",
        "CacheNodeType": "cache.r5.xlarge",
        "Engine": "redis",
        "EngineVersion": "5.0.5",
        "CacheClusterStatus": "deleting",
        "NumCacheNodes": 1,
        "PreferredAvailabilityZone": "us-west-2a",
        "CacheClusterCreateTime": "2019-11-26T03:35:04.546Z",
        "PreferredMaintenanceWindow": "mon:04:05-mon:05:05",
        "PendingModifiedValues": {},
        "NotificationConfiguration": {
            "TopicArn": "arn:aws:sns:us-west-x:xxxxxxx4152:My_Topic",
            "TopicStatus": "active"
        },
        "CacheSecurityGroups": [],
        "CacheParameterGroup": {
            "CacheParameterGroupName": "mygroup",
            "ParameterApplyStatus": "in-sync",
            "CacheNodeIdsToReboot": []
        },
        "CacheSubnetGroupName": "kxkxk",
        "AutoMinorVersionUpgrade": true,
        "SecurityGroups": [
            {
                "SecurityGroupId": "sg-xxxxxxxxxx9836",
                "Status": "active"
            },
            {
                "SecurityGroupId": "sg-xxxxxxxxxxxx7b",
                "Status": "active"
            }
        ],
        "ReplicationGroupId": "my-cluster",
        "SnapshotRetentionLimit": 0,
        "SnapshotWindow": "07:30-08:30",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅 Elasticache 用户指南中的删除集群。

有关API详细信息，请参阅 “DeleteCacheCluster AWS CLI命令参考”。

以下代码示例显示了如何使用delete-cache-parameter-group。

AWS CLI

删除缓存参数组

以下delete-cache-parameter-group示例删除了指定的缓存参数组。如果缓存参数组与任何缓存集群相关联，则无法将其删除。


aws elasticache delete-cache-parameter-group \
    --cache-parameter-group-name myparamgroup

此命令不生成任何输出。

有关更多信息，请参阅 Elasticache 用户指南中的删除参数组。

有关API详细信息，请参阅 “DeleteCacheParameterGroup AWS CLI命令参考”。

以下代码示例显示了如何使用delete-cache-subnet-group。

AWS CLI

删除缓存子网组

以下delete-cache-subnet-group示例删除了指定的缓存子网组。如果缓存子网组与任何集群关联，则无法将其删除。


aws elasticache delete-cache-subnet-group \
    --cache-subnet-group-name "mygroup"

此命令不生成任何输出。

有关更多信息，请参阅《Elasticache 用户指南》中的删除子网组。

有关API详细信息，请参阅 “DeleteCacheSubnetGroup AWS CLI命令参考”。

以下代码示例显示了如何使用delete-global-replication-group。

AWS CLI

删除全局复制组

以下delete-global-replication-group示例删除了一个新的全局复制组。


aws elasticache delete-global-replication-group \
    --global-replication-group-id my-global-replication-group \
    --retain-primary-replication-group

输出：


{
    "GlobalReplicationGroup": {
        "GlobalReplicationGroupId": "sgaui-my-grg",
        "GlobalReplicationGroupDescription": "my-grg",
        "Status": "deleting",
        "CacheNodeType": "cache.r5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.6",
        "Members": [
            {
                "ReplicationGroupId": "my-cluster-grg",
                "ReplicationGroupRegion": "us-west-2",
                "Role": "PRIMARY",
                "AutomaticFailover": "enabled",
                "Status": "associated"
            }
        ],
        "ClusterEnabled": false,
        "AuthTokenEnabled": false,
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Ela sticache 用户指南》中的使用全球数据存储跨 AWS 区域复制。

有关API详细信息，请参阅 “DeleteGlobalReplicationGroup AWS CLI命令参考”。

以下代码示例显示了如何使用delete-replication-group。

AWS CLI

删除复制组

以下delete-replication-group示例删除现有的复制组。默认情况下，此操作会删除整个复制组，包括主副本/主副本和所有只读副本。如果复制组只有一个主副本，则可以选择只删除只读副本，同时通过设置 RetainPrimaryCluster =true 保留主副本。

当您收到此操作的成功响应后，Amazon 会 ElastiCache 立即开始删除所选资源；您无法取消或恢复此操作。仅适用于 Redis。


aws elasticache delete-replication-group \
    --replication-group-id "mygroup"

输出：


{
     "ReplicationGroup": {
         "ReplicationGroupId": "mygroup",
         "Description": "my group",
         "Status": "deleting",
         "PendingModifiedValues": {},
         "AutomaticFailover": "disabled",
         "SnapshotRetentionLimit": 0,
         "SnapshotWindow": "06:00-07:00",
         "TransitEncryptionEnabled": false,
         "AtRestEncryptionEnabled": false
     }
 }

有关API详细信息，请参阅 “DeleteReplicationGroup AWS CLI命令参考”。

以下代码示例显示了如何使用delete-snapshot。

AWS CLI

删除快照

以下delete-snapshot示例使用 Redis 引擎删除了快照。


aws elasticache delete-snapshot \
    --snapshot-name mysnapshot

输出：


{
    "Snapshot": {
        "SnapshotName": "my-cluster-snapshot",
        "ReplicationGroupId": "mycluster",
        "ReplicationGroupDescription": "mycluster",
        "SnapshotStatus": "deleting",
        "SnapshotSource": "manual",
        "CacheNodeType": "cache.r5.xlarge",
        "Engine": "redis",
        "EngineVersion": "5.0.5",
        "PreferredMaintenanceWindow": "thu:12:00-thu:13:00",
        "TopicArn": "arn:aws:sns:us-west-2:xxxxxxxxxxxxx152:My_Topic",
        "Port": 6379,
        "CacheParameterGroupName": "default.redis5.0.cluster.on",
        "CacheSubnetGroupName": "default",
        "VpcId": "vpc-a3e97cdb",
        "AutoMinorVersionUpgrade": true,
        "SnapshotRetentionLimit": 1,
        "SnapshotWindow": "13:00-14:00",
        "NumNodeGroups": 4,
        "AutomaticFailover": "enabled",
        "NodeSnapshots": [
            {
                "CacheClusterId": "mycluster-0002-003",
                "NodeGroupId": "0002",
                "CacheNodeId": "0001",
                "CacheSize": "6 MB",
                "CacheNodeCreateTime": "2020-06-18T00:05:44.719000+00:00",
                "SnapshotCreateTime": "2020-06-25T20:34:30+00:00"
            },
            {
                "CacheClusterId": "mycluster-0003-003",
                "NodeGroupId": "0003",
                "CacheNodeId": "0001",
                "CacheSize": "6 MB",
                "CacheNodeCreateTime": "2019-12-05T19:13:15.912000+00:00",
                "SnapshotCreateTime": "2020-06-25T20:34:30+00:00"
            },
            {
                "CacheClusterId": "mycluster-0004-002",
                "NodeGroupId": "0004",
                "CacheNodeId": "0001",
                "CacheSize": "6 MB",
                "CacheNodeCreateTime": "2019-12-09T19:44:34.324000+00:00",
                "SnapshotCreateTime": "2020-06-25T20:34:30+00:00"
            },
            {
                "CacheClusterId": "mycluster-0005-003",
                "NodeGroupId": "0005",
                "CacheNodeId": "0001",
                "CacheSize": "6 MB",
                "CacheNodeCreateTime": "2020-06-18T00:05:44.775000+00:00",
                "SnapshotCreateTime": "2020-06-25T20:34:30+00:00"
            }
        ]
    }
}

有关更多信息，请参阅《Elasticache 用户 ElastiCache 指南》中的 Redis 备份和恢复。

有关API详细信息，请参阅 “DeleteSnapshot AWS CLI命令参考”。

以下代码示例显示了如何使用delete-user-group。

AWS CLI

删除用户组

以下delete-user-group示例删除用户组。


aws elasticache delete-user-group \
    --user-group-id myusergroup

输出：


{
    "UserGroupId": "myusergroup",
    "Status": "deleting",
    "Engine": "redis",
    "UserIds": [
        "default"
    ],
    "ReplicationGroups": [],
    "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:usergroup:myusergroup"
}

有关更多信息，请参阅《Elast icache 用户指南》中的使用基于角色的访问控制对用户进行身份验证 (RBAC)。

有关API详细信息，请参阅 “DeleteUserGroup AWS CLI命令参考”。

以下代码示例显示了如何使用delete-user。

AWS CLI

删除用户

以下delete-user示例删除用户。


aws elasticache delete-user \
    --user-id user2

输出：


{
    "UserId": "user1",
    "UserName": "myUser",
    "Status": "deleting",
    "Engine": "redis",
    "AccessString": "on ~* +@all",
    "UserGroupIds": [
        "myusergroup"
    ],
    "Authentication": {
        "Type": "password",
        "PasswordCount": 1
    },
    "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:user:user1"
}

有关更多信息，请参阅《Elast icache 用户指南》中的使用基于角色的访问控制对用户进行身份验证 (RBAC)。

有关API详细信息，请参阅 “DeleteUser AWS CLI命令参考”。

以下代码示例显示了如何使用describe-cache-clusters。

AWS CLI

描述缓存集群

以下describe-cache-clusters示例描述了一个缓存集群。


aws elasticache describe-cache-clusters

输出：


{
    "CacheClusters": [
    {
            "CacheClusterId": "my-cluster-003",
            "ClientDownloadLandingPage": "https://console.aws.amazon.com/elasticache/home#client-download:",
            "CacheNodeType": "cache.r5.large",
            "Engine": "redis",
            "EngineVersion": "5.0.5",
            "CacheClusterStatus": "available",
            "NumCacheNodes": 1,
            "PreferredAvailabilityZone": "us-west-2a",
            "CacheClusterCreateTime": "2019-11-26T01:22:52.396Z",
            "PreferredMaintenanceWindow": "mon:17:30-mon:18:30",
            "PendingModifiedValues": {},
            "NotificationConfiguration": {
                "TopicArn": "arn:aws:sns:us-west-2:xxxxxxxxxxx152:My_Topic",
                "TopicStatus": "active"
            },
            "CacheSecurityGroups": [],
            "CacheParameterGroup": {
                "CacheParameterGroupName": "default.redis5.0",
                "ParameterApplyStatus": "in-sync",
                "CacheNodeIdsToReboot": []
            },
            "CacheSubnetGroupName": "kxkxk",
            "AutoMinorVersionUpgrade": true,
            "SecurityGroups": [
                {
                    "SecurityGroupId": "sg-xxxxxd7b",
                    "Status": "active"
                }
            ],
            "ReplicationGroupId": "my-cluster",
            "SnapshotRetentionLimit": 0,
            "SnapshotWindow": "06:30-07:30",
            "AuthTokenEnabled": false,
            "TransitEncryptionEnabled": false,
            "AtRestEncryptionEnabled": false,
            "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxxx152:cluster:my-cache-cluster",
            "ReplicationGroupLogDeliveryEnabled": false,
            "LogDeliveryConfigurations": [
                {
                    "LogType": "slow-log",
                    "DestinationType": "cloudwatch-logs",
                    "DestinationDetails": {
                        "CloudWatchLogsDetails": {
                            "LogGroup": "test-log"
                        }
                    },
                    "LogFormat": "text",
                    "Status": "active"
                }
            ]
        }
    ]
}

有关更多信息，请参阅《Elasticache 用户指南》中的管理集群。

有关API详细信息，请参阅 “DescribeCacheClusters AWS CLI命令参考”。

以下代码示例显示了如何使用describe-cache-engine-versions。

AWS CLI

描述缓存引擎版本

以下describe-cache-engine-versions示例返回可用缓存引擎及其版本的列表。


aws elasticache describe-cache-engine-versions \
    --engine "Redis"

输出：


{
    "CacheEngineVersions": [
        {
            "Engine": "redis",
            "EngineVersion": "2.6.13",
            "CacheParameterGroupFamily": "redis2.6",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 2.6.13"
        },
        {
            "Engine": "redis",
            "EngineVersion": "2.8.19",
            "CacheParameterGroupFamily": "redis2.8",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 2.8.19"
        },
        {
            "Engine": "redis",
            "EngineVersion": "2.8.21",
            "CacheParameterGroupFamily": "redis2.8",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 2.8.21"
        },
        {
            "Engine": "redis",
            "EngineVersion": "2.8.22",
            "CacheParameterGroupFamily": "redis2.8",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 2.8.22"
        },
        {
            "Engine": "redis",
            "EngineVersion": "2.8.23",
            "CacheParameterGroupFamily": "redis2.8",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 2.8.23"
        },
        {
            "Engine": "redis",
            "EngineVersion": "2.8.24",
            "CacheParameterGroupFamily": "redis2.8",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 2.8.24"
        },
        {
            "Engine": "redis",
            "EngineVersion": "2.8.6",
            "CacheParameterGroupFamily": "redis2.8",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 2.8.6"
        },
        {
            "Engine": "redis",
            "EngineVersion": "3.2.10",
            "CacheParameterGroupFamily": "redis3.2",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 3.2.10"
        },
        {
            "Engine": "redis",
            "EngineVersion": "3.2.4",
            "CacheParameterGroupFamily": "redis3.2",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 3.2.4"
        },
        {
            "Engine": "redis",
            "EngineVersion": "3.2.6",
            "CacheParameterGroupFamily": "redis3.2",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 3.2.6"
        },
        {
            "Engine": "redis",
            "EngineVersion": "4.0.10",
            "CacheParameterGroupFamily": "redis4.0",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 4.0.10"
        },
        {
            "Engine": "redis",
            "EngineVersion": "5.0.0",
            "CacheParameterGroupFamily": "redis5.0",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 5.0.0"
        },
        {
            "Engine": "redis",
            "EngineVersion": "5.0.3",
            "CacheParameterGroupFamily": "redis5.0",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 5.0.3"
        },
        {
            "Engine": "redis",
            "EngineVersion": "5.0.4",
            "CacheParameterGroupFamily": "redis5.0",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 5.0.4"
        },
        {
            "Engine": "redis",
            "EngineVersion": "5.0.5",
            "CacheParameterGroupFamily": "redis5.0",
            "CacheEngineDescription": "Redis",
            "CacheEngineVersionDescription": "redis version 5.0.5"
        }
    ]
}

有关API详细信息，请参阅 “DescribeCacheEngineVersions AWS CLI命令参考”。

以下代码示例显示了如何使用describe-cache-parameter-groups。

AWS CLI

描述缓存参数组

以下describe-cache-parameter-groups示例返回缓存参数组描述的列表。


aws elasticache describe-cache-parameter-groups \
    --cache-parameter-group-name "mygroup"

输出：


{
    "CacheParameterGroups": [
        {
            "CacheParameterGroupName": "mygroup",
            "CacheParameterGroupFamily": "redis5.0",
            "Description": " "
        }
    ]
}

有关更多信息，请参阅 Elasticache 用户指南中的使用参数组配置引擎参数。

有关API详细信息，请参阅 “DescribeCacheParameterGroups AWS CLI命令参考”。

以下代码示例显示了如何使用describe-cache-parameters。

AWS CLI

描述缓存参数

以下 “describe-cache-parameters” 示例返回指定缓存参数组的详细参数列表。


aws elasticache describe-cache-parameters \
    --cache-parameter-group-name "myparamgroup"

输出：


{
    "Parameters": [
        {
            "ParameterName": "activedefrag",
            "ParameterValue": "yes",
            "Description": "Enabled active memory defragmentation",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "active-defrag-cycle-max",
            "ParameterValue": "75",
            "Description": "Maximal effort for defrag in CPU percentage",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1-75",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "active-defrag-cycle-min",
            "ParameterValue": "5",
            "Description": "Minimal effort for defrag in CPU percentage",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1-75",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "active-defrag-ignore-bytes",
            "ParameterValue": "104857600",
            "Description": "Minimum amount of fragmentation waste to start active defrag",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1048576-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "active-defrag-max-scan-fields",
            "ParameterValue": "1000",
            "Description": "Maximum number of set/hash/zset/list fields that will be processed from the main dictionary scan",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1-1000000",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "active-defrag-threshold-lower",
            "ParameterValue": "10",
            "Description": "Minimum percentage of fragmentation to start active defrag",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1-100",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "active-defrag-threshold-upper",
            "ParameterValue": "100",
            "Description": "Maximum percentage of fragmentation at which we use maximum effort",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1-100",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "activerehashing",
            "ParameterValue": "yes",
            "Description": "Apply rehashing or not.",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "requires-reboot"
        },
        {
            "ParameterName": "appendfsync",
            "ParameterValue": "everysec",
            "Description": "fsync policy for AOF persistence",
            "Source": "system",
            "DataType": "string",
            "AllowedValues": "always,everysec,no",
            "IsModifiable": false,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "appendonly",
            "ParameterValue": "no",
            "Description": "Enable Redis persistence.",
            "Source": "system",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": false,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "client-output-buffer-limit-normal-hard-limit",
            "ParameterValue": "0",
            "Description": "Normal client output buffer hard limit in bytes.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "client-output-buffer-limit-normal-soft-limit",
            "ParameterValue": "0",
            "Description": "Normal client output buffer soft limit in bytes.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "client-output-buffer-limit-normal-soft-seconds",
            "ParameterValue": "0",
            "Description": "Normal client output buffer soft limit in seconds.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "client-output-buffer-limit-pubsub-hard-limit",
            "ParameterValue": "33554432",
            "Description": "Pubsub client output buffer hard limit in bytes.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "client-output-buffer-limit-pubsub-soft-limit",
            "ParameterValue": "8388608",
            "Description": "Pubsub client output buffer soft limit in bytes.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "client-output-buffer-limit-pubsub-soft-seconds",
            "ParameterValue": "60",
            "Description": "Pubsub client output buffer soft limit in seconds.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "client-output-buffer-limit-replica-soft-seconds",
            "ParameterValue": "60",
            "Description": "Replica client output buffer soft limit in seconds.",
            "Source": "system",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": false,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "client-query-buffer-limit",
            "ParameterValue": "1073741824",
            "Description": "Max size of a single client query buffer",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1048576-1073741824",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "close-on-replica-write",
            "ParameterValue": "yes",
            "Description": "If enabled, clients who attempt to write to a read-only replica will be disconnected. Applicable to 2.8.23 and higher.",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "cluster-enabled",
            "ParameterValue": "no",
            "Description": "Enable cluster mode",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "requires-reboot"
        },
        {
            "ParameterName": "cluster-require-full-coverage",
            "ParameterValue": "no",
            "Description": "Whether cluster becomes unavailable if one or more slots are not covered",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "databases",
            "ParameterValue": "16",
            "Description": "Set the number of databases.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1-1200000",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "requires-reboot"
        },
        {
            "ParameterName": "hash-max-ziplist-entries",
            "ParameterValue": "512",
            "Description": "The maximum number of hash entries in order for the dataset to be compressed.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "hash-max-ziplist-value",
            "ParameterValue": "64",
            "Description": "The threshold of biggest hash entries in order for the dataset to be compressed.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "hll-sparse-max-bytes",
            "ParameterValue": "3000",
            "Description": "HyperLogLog sparse representation bytes limit",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1-16000",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "lazyfree-lazy-eviction",
            "ParameterValue": "no",
            "Description": "Perform an asynchronous delete on evictions",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "lazyfree-lazy-expire",
            "ParameterValue": "no",
            "Description": "Perform an asynchronous delete on expired keys",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "lazyfree-lazy-server-del",
            "ParameterValue": "no",
            "Description": "Perform an asynchronous delete on key updates",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "lfu-decay-time",
            "ParameterValue": "1",
            "Description": "The amount of time in minutes to decrement the key counter for LFU eviction policy",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "lfu-log-factor",
            "ParameterValue": "10",
            "Description": "The log factor for incrementing key counter for LFU eviction policy",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "list-compress-depth",
            "ParameterValue": "0",
            "Description": "Number of quicklist ziplist nodes from each side of the list to exclude from compression. The head and tail of the list are always uncompressed for fast push/pop operations",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "list-max-ziplist-size",
            "ParameterValue": "-2",
            "Description": "The number of entries allowed per internal list node can be specified as a fixed maximum size or a maximum number of elements",
            "Source": "system",
            "DataType": "integer",
            "AllowedValues": "-5,-4,-3,-2,-1,1-",
            "IsModifiable": false,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "lua-replicate-commands",
            "ParameterValue": "yes",
            "Description": "Always enable Lua effect replication or not",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "lua-time-limit",
            "ParameterValue": "5000",
            "Description": "Max execution time of a Lua script in milliseconds. 0 for unlimited execution without warnings.",
            "Source": "system",
            "DataType": "integer",
            "AllowedValues": "5000",
            "IsModifiable": false,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "maxclients",
            "ParameterValue": "65000",
            "Description": "The maximum number of Redis clients.",
            "Source": "system",
            "DataType": "integer",
            "AllowedValues": "1-65000",
            "IsModifiable": false,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "requires-reboot"
        },
        {
            "ParameterName": "maxmemory-policy",
            "ParameterValue": "volatile-lru",
            "Description": "Max memory policy.",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "volatile-lru,allkeys-lru,volatile-lfu,allkeys-lfu,volatile-random,allkeys-random,volatile-ttl,noeviction",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "maxmemory-samples",
            "ParameterValue": "3",
            "Description": "Max memory samples.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "min-replicas-max-lag",
            "ParameterValue": "10",
            "Description": "The maximum amount of replica lag in seconds beyond which the master would stop taking writes. A value of 0 means the master always takes writes.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "min-replicas-to-write",
            "ParameterValue": "0",
            "Description": "The minimum number of replicas that must be present with lag no greater than min-replicas-max-lag for master to take writes. Setting this to 0 means the master always takes writes.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "notify-keyspace-events",
            "Description": "The keyspace events for Redis to notify Pub/Sub clients about. By default all notifications are disabled",
            "Source": "user",
            "DataType": "string",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "proto-max-bulk-len",
            "ParameterValue": "536870912",
            "Description": "Max size of a single element request",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "1048576-536870912",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "rename-commands",
            "ParameterValue": "",
            "Description": "Redis commands that can be dynamically renamed by the customer",
            "Source": "user",
            "DataType": "string",
            "AllowedValues": "APPEND,BITCOUNT,BITFIELD,BITOP,BITPOS,BLPOP,BRPOP,BRPOPLPUSH,BZPOPMIN,BZPOPMAX,CLIENT,COMMAND,DBSIZE,DECR,DECRBY,DEL,DISCARD,DUMP,ECHO,EVAL,EVALSHA,EXEC,EXISTS,EXPIRE,EXPIREAT,FLUSHALL,FLUSHDB,GEOADD,GEOHASH,GEOPOS,GEODIST,GEORADIUS,GEORADIUSBYMEMBER,GET,GETBIT,GETRANGE,GETSET,HDEL,HEXISTS,HGET,HGETALL,HINCRBY,HINCRBYFLOAT,HKEYS,HLEN,HMGET,HMSET,HSET,HSETNX,HSTRLEN,HVALS,INCR,INCRBY,INCRBYFLOAT,INFO,KEYS,LASTSAVE,LINDEX,LINSERT,LLEN,LPOP,LPUSH,LPUSHX,LRANGE,LREM,LSET,LTRIM,MEMORY,MGET,MONITOR,MOVE,MSET,MSETNX,MULTI,OBJECT,PERSIST,PEXPIRE,PEXPIREAT,PFADD,PFCOUNT,PFMERGE,PING,PSETEX,PSUBSCRIBE,PUBSUB,PTTL,PUBLISH,PUNSUBSCRIBE,RANDOMKEY,READONLY,READWRITE,RENAME,RENAMENX,RESTORE,ROLE,RPOP,RPOPLPUSH,RPUSH,RPUSHX,SADD,SCARD,SCRIPT,SDIFF,SDIFFSTORE,SELECT,SET,SETBIT,SETEX,SETNX,SETRANGE,SINTER,SINTERSTORE,SISMEMBER,SLOWLOG,SMEMBERS,SMOVE,SORT,SPOP,SRANDMEMBER,SREM,STRLEN,SUBSCRIBE,SUNION,SUNIONSTORE,SWAPDB,TIME,TOUCH,TTL,TYPE,UNSUBSCRIBE,UNLINK,UNWATCH,WAIT,WATCH,ZADD,ZCARD,ZCOUNT,ZINCRBY,ZINTERSTORE,ZLEXCOUNT,ZPOPMAX,ZPOPMIN,ZRANGE,ZRANGEBYLEX,ZREVRANGEBYLEX,ZRANGEBYSCORE,ZRANK,ZREM,ZREMRANGEBYLEX,ZREMRANGEBYRANK,ZREMRANGEBYSCORE,ZREVRANGE,ZREVRANGEBYSCORE,ZREVRANK,ZSCORE,ZUNIONSTORE,SCAN,SSCAN,HSCAN,ZSCAN,XINFO,XADD,XTRIM,XDEL,XRANGE,XREVRANGE,XLEN,XREAD,XGROUP,XREADGROUP,XACK,XCLAIM,XPENDING,GEORADIUS_RO,GEORADIUSBYMEMBER_RO,LOLWUT,XSETID,SUBSTR",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.3",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "repl-backlog-size",
            "ParameterValue": "1048576",
            "Description": "The replication backlog size in bytes for PSYNC. This is the size of the buffer which accumulates slave data when slave is disconnected for some time, so that when slave reconnects again, only transfer the portion of data which the slave missed. Minimum value is 16K.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "16384-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "repl-backlog-ttl",
            "ParameterValue": "3600",
            "Description": "The amount of time in seconds after the master no longer have any slaves connected for the master to free the replication backlog. A value of 0 means to never release the backlog.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "replica-allow-chaining",
            "ParameterValue": "no",
            "Description": "Configures if chaining of replicas is allowed",
            "Source": "system",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": false,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "replica-ignore-maxmemory",
            "ParameterValue": "yes",
            "Description": "Determines if replica ignores maxmemory setting by not evicting items independent from the master",
            "Source": "system",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": false,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "replica-lazy-flush",
            "ParameterValue": "no",
            "Description": "Perform an asynchronous flushDB during replica sync",
            "Source": "system",
            "DataType": "string",
            "AllowedValues": "yes,no",
            "IsModifiable": false,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "reserved-memory-percent",
            "ParameterValue": "25",
            "Description": "The percent of memory reserved for non-cache memory usage. You may want to increase this parameter for nodes with read replicas, AOF enabled, etc, to reduce swap usage.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-100",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "set-max-intset-entries",
            "ParameterValue": "512",
            "Description": "The limit in the size of the set in order for the dataset to be compressed.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "slowlog-log-slower-than",
            "ParameterValue": "10000",
            "Description": "The execution time, in microseconds, to exceed in order for the command to get logged. Note that a negative number disables the slow log, while a value of zero forces the logging of every command.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "slowlog-max-len",
            "ParameterValue": "128",
            "Description": "The length of the slow log. There is no limit to this length. Just be aware that it will consume memory. You can reclaim memory used by the slow log with SLOWLOG RESET.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "stream-node-max-bytes",
            "ParameterValue": "4096",
            "Description": "The maximum size of a single node in a stream in bytes",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "stream-node-max-entries",
            "ParameterValue": "100",
            "Description": "The maximum number of items a single node in a stream can contain",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "tcp-keepalive",
            "ParameterValue": "300",
            "Description": "If non-zero, send ACKs every given number of seconds.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "timeout",
            "ParameterValue": "0",
            "Description": "Close connection if client is idle for a given number of seconds, or never if 0.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0,20-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "zset-max-ziplist-entries",
            "ParameterValue": "128",
            "Description": "The maximum number of sorted set entries in order for the dataset to be compressed.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        },
        {
            "ParameterName": "zset-max-ziplist-value",
            "ParameterValue": "64",
            "Description": "The threshold of biggest sorted set entries in order for the dataset to be compressed.",
            "Source": "user",
            "DataType": "integer",
            "AllowedValues": "0-",
            "IsModifiable": true,
            "MinimumEngineVersion": "5.0.0",
            "ChangeType": "immediate"
        }
    ]
}

有关更多信息，请参阅《Elasticache 用户指南》中的参数管理。

有关API详细信息，请参阅 “DescribeCacheParameters AWS CLI命令参考”。

以下代码示例显示了如何使用describe-cache-subnet-groups。

AWS CLI

描述缓存子网组

以下describe-cache-subnet-groups示例返回子网组列表。


aws elasticache describe-cache-subnet-groups

输出：


{
    "CacheSubnetGroups": [
        {
            "CacheSubnetGroupName": "default",
            "CacheSubnetGroupDescription": "Default CacheSubnetGroup",
            "VpcId": "vpc-a3e97cdb",
            "Subnets": [
                {
                    "SubnetIdentifier": "subnet-8d4bacf5",
                    "SubnetAvailabilityZone": {
                        "Name": "us-west-2b"
                    }
                },
                {
                    "SubnetIdentifier": "subnet-dde21380",
                    "SubnetAvailabilityZone": {
                        "Name": "us-west-2c"
                    }
                },
                {
                    "SubnetIdentifier": "subnet-6485ec4f",
                    "SubnetAvailabilityZone": {
                        "Name": "us-west-2d"
                    }
                },
                {
                    "SubnetIdentifier": "subnet-b4ebebff",
                    "SubnetAvailabilityZone": {
                        "Name": "us-west-2a"
                    }
                }
            ]
        },
        {
            "CacheSubnetGroupName": "kxkxk",
            "CacheSubnetGroupDescription": "mygroup",
            "VpcId": "vpc-a3e97cdb",
            "Subnets": [
                {
                    "SubnetIdentifier": "subnet-b4ebebff",
                    "SubnetAvailabilityZone": {
                        "Name": "us-west-2a"
                    }
                }
            ]
        },
        {
            "CacheSubnetGroupName": "test",
            "CacheSubnetGroupDescription": "test",
            "VpcId": "vpc-a3e97cdb",
            "Subnets": [
                {
                    "SubnetIdentifier": "subnet-b4ebebff",
                    "SubnetAvailabilityZone": {
                        "Name": "us-west-2a"
                    }
                }
            ]
        }
    ]
}

有关更多信息，请参阅 Elasticache 用户指南中的子网和子网组或ElastiCache 适用于 Memcached 的用户指南中的子网和子网组。

有关API详细信息，请参阅 “DescribeCacheSubnetGroups AWS CLI命令参考”。

以下代码示例显示了如何使用describe-engine-default-parameters。

AWS CLI

描述引擎默认参数

以下describe-engine-default-parameters示例返回指定缓存引擎的默认引擎和系统参数信息。


aws elasticache describe-engine-default-parameters \
    --cache-parameter-group-family "redis5.0"

输出：


{
    "EngineDefaults": {
        "Parameters": [
            {
                "ParameterName": "activedefrag",
                "ParameterValue": "no",
                "Description": "Enabled active memory defragmentation",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "active-defrag-cycle-max",
                "ParameterValue": "75",
                "Description": "Maximal effort for defrag in CPU percentage",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-75",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "active-defrag-cycle-min",
                "ParameterValue": "5",
                "Description": "Minimal effort for defrag in CPU percentage",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-75",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "active-defrag-ignore-bytes",
                "ParameterValue": "104857600",
                "Description": "Minimum amount of fragmentation waste to start active defrag",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1048576-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "active-defrag-max-scan-fields",
                "ParameterValue": "1000",
                "Description": "Maximum number of set/hash/zset/list fields that will be processed from the main dictionary scan",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-1000000",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "active-defrag-threshold-lower",
                "ParameterValue": "10",
                "Description": "Minimum percentage of fragmentation to start active defrag",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-100",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "active-defrag-threshold-upper",
                "ParameterValue": "100",
                "Description": "Maximum percentage of fragmentation at which we use maximum effort",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-100",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "activerehashing",
                "ParameterValue": "yes",
                "Description": "Apply rehashing or not.",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "requires-reboot"
            },
            {
                "ParameterName": "appendfsync",
                "ParameterValue": "everysec",
                "Description": "fsync policy for AOF persistence",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "always,everysec,no",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "appendonly",
                "ParameterValue": "no",
                "Description": "Enable Redis persistence.",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "client-output-buffer-limit-normal-hard-limit",
                "ParameterValue": "0",
                "Description": "Normal client output buffer hard limit in bytes.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "client-output-buffer-limit-normal-soft-limit",
                "ParameterValue": "0",
                "Description": "Normal client output buffer soft limit in bytes.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "client-output-buffer-limit-normal-soft-seconds",
                "ParameterValue": "0",
                "Description": "Normal client output buffer soft limit in seconds.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "client-output-buffer-limit-pubsub-hard-limit",
                "ParameterValue": "33554432",
                "Description": "Pubsub client output buffer hard limit in bytes.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "client-output-buffer-limit-pubsub-soft-limit",
                "ParameterValue": "8388608",
                "Description": "Pubsub client output buffer soft limit in bytes.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "client-output-buffer-limit-pubsub-soft-seconds",
                "ParameterValue": "60",
                "Description": "Pubsub client output buffer soft limit in seconds.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "client-output-buffer-limit-replica-soft-seconds",
                "ParameterValue": "60",
                "Description": "Replica client output buffer soft limit in seconds.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "client-query-buffer-limit",
                "ParameterValue": "1073741824",
                "Description": "Max size of a single client query buffer",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1048576-1073741824",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "close-on-replica-write",
                "ParameterValue": "yes",
                "Description": "If enabled, clients who attempt to write to a read-only replica will be disconnected. Applicable to 2.8.23 and higher.",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "cluster-enabled",
                "ParameterValue": "no",
                "Description": "Enable cluster mode",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "requires-reboot"
            },
            {
                "ParameterName": "cluster-require-full-coverage",
                "ParameterValue": "no",
                "Description": "Whether cluster becomes unavailable if one or more slots are not covered",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "databases",
                "ParameterValue": "16",
                "Description": "Set the number of databases.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-1200000",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "requires-reboot"
            },
            {
                "ParameterName": "hash-max-ziplist-entries",
                "ParameterValue": "512",
                "Description": "The maximum number of hash entries in order for the dataset to be compressed.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "hash-max-ziplist-value",
                "ParameterValue": "64",
                "Description": "The threshold of biggest hash entries in order for the dataset to be compressed.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "hll-sparse-max-bytes",
                "ParameterValue": "3000",
                "Description": "HyperLogLog sparse representation bytes limit",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-16000",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "lazyfree-lazy-eviction",
                "ParameterValue": "no",
                "Description": "Perform an asynchronous delete on evictions",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "lazyfree-lazy-expire",
                "ParameterValue": "no",
                "Description": "Perform an asynchronous delete on expired keys",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "lazyfree-lazy-server-del",
                "ParameterValue": "no",
                "Description": "Perform an asynchronous delete on key updates",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "lfu-decay-time",
                "ParameterValue": "1",
                "Description": "The amount of time in minutes to decrement the key counter for LFU eviction policy",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "lfu-log-factor",
                "ParameterValue": "10",
                "Description": "The log factor for incrementing key counter for LFU eviction policy",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "list-compress-depth",
                "ParameterValue": "0",
                "Description": "Number of quicklist ziplist nodes from each side of the list to exclude from compression. The head and tail of the list are always uncompressed for fast push/pop operations",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "list-max-ziplist-size",
                "ParameterValue": "-2",
                "Description": "The number of entries allowed per internal list node can be specified as a fixed maximum size or a maximum number of elements",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "-5,-4,-3,-2,-1,1-",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "lua-replicate-commands",
                "ParameterValue": "yes",
                "Description": "Always enable Lua effect replication or not",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "lua-time-limit",
                "ParameterValue": "5000",
                "Description": "Max execution time of a Lua script in milliseconds. 0 for unlimited execution without warnings.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "5000",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "maxclients",
                "ParameterValue": "65000",
                "Description": "The maximum number of Redis clients.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-65000",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "requires-reboot"
            },
            {
                "ParameterName": "maxmemory-policy",
                "ParameterValue": "volatile-lru",
                "Description": "Max memory policy.",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "volatile-lru,allkeys-lru,volatile-lfu,allkeys-lfu,volatile-random,allkeys-random,volatile-ttl,noeviction",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "maxmemory-samples",
                "ParameterValue": "3",
                "Description": "Max memory samples.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "min-replicas-max-lag",
                "ParameterValue": "10",
                "Description": "The maximum amount of replica lag in seconds beyond which the master would stop taking writes. A value of 0 means the master always takes writes.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "min-replicas-to-write",
                "ParameterValue": "0",
                "Description": "The minimum number of replicas that must be present with lag no greater than min-replicas-max-lag for master to take writes. Setting this to 0 means the master always takes writes.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "notify-keyspace-events",
                "Description": "The keyspace events for Redis to notify Pub/Sub clients about. By default all notifications are disabled",
                "Source": "system",
                "DataType": "string",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "proto-max-bulk-len",
                "ParameterValue": "536870912",
                "Description": "Max size of a single element request",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "1048576-536870912",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "rename-commands",
                "ParameterValue": "",
                "Description": "Redis commands that can be dynamically renamed by the customer",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "APPEND,BITCOUNT,BITFIELD,BITOP,BITPOS,BLPOP,BRPOP,BRPOPLPUSH,BZPOPMIN,BZPOPMAX,CLIENT,COMMAND,DBSIZE,DECR,DECRBY,DEL,DISCARD,DUMP,ECHO,EVAL,EVALSHA,EXEC,EXISTS,EXPIRE,EXPIREAT,FLUSHALL,FLUSHDB,GEOADD,GEOHASH,GEOPOS,GEODIST,GEORADIUS,GEORADIUSBYMEMBER,GET,GETBIT,GETRANGE,GETSET,HDEL,HEXISTS,HGET,HGETALL,HINCRBY,HINCRBYFLOAT,HKEYS,HLEN,HMGET,HMSET,HSET,HSETNX,HSTRLEN,HVALS,INCR,INCRBY,INCRBYFLOAT,INFO,KEYS,LASTSAVE,LINDEX,LINSERT,LLEN,LPOP,LPUSH,LPUSHX,LRANGE,LREM,LSET,LTRIM,MEMORY,MGET,MONITOR,MOVE,MSET,MSETNX,MULTI,OBJECT,PERSIST,PEXPIRE,PEXPIREAT,PFADD,PFCOUNT,PFMERGE,PING,PSETEX,PSUBSCRIBE,PUBSUB,PTTL,PUBLISH,PUNSUBSCRIBE,RANDOMKEY,READONLY,READWRITE,RENAME,RENAMENX,RESTORE,ROLE,RPOP,RPOPLPUSH,RPUSH,RPUSHX,SADD,SCARD,SCRIPT,SDIFF,SDIFFSTORE,SELECT,SET,SETBIT,SETEX,SETNX,SETRANGE,SINTER,SINTERSTORE,SISMEMBER,SLOWLOG,SMEMBERS,SMOVE,SORT,SPOP,SRANDMEMBER,SREM,STRLEN,SUBSCRIBE,SUNION,SUNIONSTORE,SWAPDB,TIME,TOUCH,TTL,TYPE,UNSUBSCRIBE,UNLINK,UNWATCH,WAIT,WATCH,ZADD,ZCARD,ZCOUNT,ZINCRBY,ZINTERSTORE,ZLEXCOUNT,ZPOPMAX,ZPOPMIN,ZRANGE,ZRANGEBYLEX,ZREVRANGEBYLEX,ZRANGEBYSCORE,ZRANK,ZREM,ZREMRANGEBYLEX,ZREMRANGEBYRANK,ZREMRANGEBYSCORE,ZREVRANGE,ZREVRANGEBYSCORE,ZREVRANK,ZSCORE,ZUNIONSTORE,SCAN,SSCAN,HSCAN,ZSCAN,XINFO,XADD,XTRIM,XDEL,XRANGE,XREVRANGE,XLEN,XREAD,XGROUP,XREADGROUP,XACK,XCLAIM,XPENDING,GEORADIUS_RO,GEORADIUSBYMEMBER_RO,LOLWUT,XSETID,SUBSTR",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.3",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "repl-backlog-size",
                "ParameterValue": "1048576",
                "Description": "The replication backlog size in bytes for PSYNC. This is the size of the buffer which accumulates slave data when slave is disconnected for some time, so that when slave reconnects again, only transfer the portion of data which the slave missed. Minimum value is 16K.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "16384-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "repl-backlog-ttl",
                "ParameterValue": "3600",
                "Description": "The amount of time in seconds after the master no longer have any slaves connected for the master to free the replication backlog. A value of 0 means to never release the backlog.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "replica-allow-chaining",
                "ParameterValue": "no",
                "Description": "Configures if chaining of replicas is allowed",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "replica-ignore-maxmemory",
                "ParameterValue": "yes",
                "Description": "Determines if replica ignores maxmemory setting by not evicting items independent from the master",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "replica-lazy-flush",
                "ParameterValue": "no",
                "Description": "Perform an asynchronous flushDB during replica sync",
                "Source": "system",
                "DataType": "string",
                "AllowedValues": "yes,no",
                "IsModifiable": false,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "reserved-memory-percent",
                "ParameterValue": "25",
                "Description": "The percent of memory reserved for non-cache memory usage. You may want to increase this parameter for nodes with read replicas, AOF enabled, etc, to reduce swap usage.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-100",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "set-max-intset-entries",
                "ParameterValue": "512",
                "Description": "The limit in the size of the set in order for the dataset to be compressed.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "slowlog-log-slower-than",
                "ParameterValue": "10000",
                "Description": "The execution time, in microseconds, to exceed in order for the command to get logged. Note that a negative number disables the slow log, while a value of zero forces the logging of every command.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "slowlog-max-len",
                "ParameterValue": "128",
                "Description": "The length of the slow log. There is no limit to this length. Just be aware that it will consume memory. You can reclaim memory used by the slow log with SLOWLOG RESET.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "stream-node-max-bytes",
                "ParameterValue": "4096",
                "Description": "The maximum size of a single node in a stream in bytes",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "stream-node-max-entries",
                "ParameterValue": "100",
                "Description": "The maximum number of items a single node in a stream can contain",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "tcp-keepalive",
                "ParameterValue": "300",
                "Description": "If non-zero, send ACKs every given number of seconds.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "timeout",
                "ParameterValue": "0",
                "Description": "Close connection if client is idle for a given number of seconds, or never if 0.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0,20-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "zset-max-ziplist-entries",
                "ParameterValue": "128",
                "Description": "The maximum number of sorted set entries in order for the dataset to be compressed.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            },
            {
                "ParameterName": "zset-max-ziplist-value",
                "ParameterValue": "64",
                "Description": "The threshold of biggest sorted set entries in order for the dataset to be compressed.",
                "Source": "system",
                "DataType": "integer",
                "AllowedValues": "0-",
                "IsModifiable": true,
                "MinimumEngineVersion": "5.0.0",
                "ChangeType": "immediate"
            }
        ]
    }
}

有关API详细信息，请参阅 “DescribeEngineDefaultParameters AWS CLI命令参考”。

以下代码示例显示了如何使用describe-events。

AWS CLI

描述复制组的事件

以下describe-events示例返回复制组的事件列表。


aws elasticache describe-events \
    --source-identifier test-cluster \
    --source-type replication-group

输出：


{
    "Events": [
        {
            "SourceIdentifier": "test-cluster",
            "SourceType": "replication-group",
            "Message": "Automatic failover has been turned on for replication group test-cluster",
            "Date": "2020-03-18T23:51:34.457Z"
        },
        {
            "SourceIdentifier": "test-cluster",
            "SourceType": "replication-group",
            "Message": "Replication group test-cluster created",
            "Date": "2020-03-18T23:50:31.378Z"
        }
    ]
}

有关更多信息，请参阅《Elasticache 用户指南》中的监控事件。

有关API详细信息，请参阅 “DescribeEvents AWS CLI命令参考”。

以下代码示例显示了如何使用describe-global-replication-groups。

AWS CLI

描述全局复制组

以下describe-global-replication-groups示例返回全局数据存储的详细信息。


aws elasticache describe-global-replication-groups \
    --global-replication-group-id my-grg

输出：


{
    "GlobalReplicationGroups": [
        {
            "GlobalReplicationGroupId": "my-grg",
            "GlobalReplicationGroupDescription": "my-grg",
            "Status": "creating",
            "CacheNodeType": "cache.r5.large",
            "Engine": "redis",
            "EngineVersion": "5.0.6",
            "ClusterEnabled": false,
            "AuthTokenEnabled": false,
            "TransitEncryptionEnabled": false,
            "AtRestEncryptionEnabled": false
        }
    ]
}

有关更多信息，请参阅《Ela sticache 用户指南》中的使用全球数据存储跨 AWS 区域复制。

有关API详细信息，请参阅 “DescribeGlobalReplicationGroups AWS CLI命令参考”。

以下代码示例显示了如何使用describe-replication-groups。

AWS CLI

返回复制组详细信息列表

以下describe-replication-groups示例返回复制组。


aws elasticache describe-replication-groups

输出：


{
    "ReplicationGroups": [
        {
            "ReplicationGroupId": "my-cluster",
            "Description": "mycluster",
            "Status": "available",
            "PendingModifiedValues": {},
            "MemberClusters": [
                "pat-cluster-001",
                "pat-cluster-002",
                "pat-cluster-003",
                "pat-cluster-004"
            ],
            "NodeGroups": [
                {
                    "NodeGroupId": "0001",
                    "Status": "available",
                    "PrimaryEndpoint": {
                        "Address": "my-cluster.xxxxih.ng.0001.usw2.cache.amazonaws.com",
                        "Port": 6379
                    },
                    "ReaderEndpoint": {
                        "Address": "my-cluster-ro.xxxxih.ng.0001.usw2.cache.amazonaws.com",
                        "Port": 6379
                    },
                    "NodeGroupMembers": [
                        {
                            "CacheClusterId": "my-cluster-001",
                            "CacheNodeId": "0001",
                            "ReadEndpoint": {
                                "Address": "pat-cluster-001.xxxih.0001.usw2.cache.amazonaws.com",
                                "Port": 6379
                            },
                            "PreferredAvailabilityZone": "us-west-2a",
                            "CurrentRole": "primary"
                        },
                        {
                            "CacheClusterId": "my-cluster-002",
                            "CacheNodeId": "0001",
                            "ReadEndpoint": {
                                "Address": "pat-cluster-002.xxxxih.0001.usw2.cache.amazonaws.com",
                                "Port": 6379
                            },
                            "PreferredAvailabilityZone": "us-west-2a",
                            "CurrentRole": "replica"
                        },
                        {
                            "CacheClusterId": "my-cluster-003",
                            "CacheNodeId": "0001",
                            "ReadEndpoint": {
                                "Address": "pat-cluster-003.xxxxih.0001.usw2.cache.amazonaws.com",
                                "Port": 6379
                            },
                            "PreferredAvailabilityZone": "us-west-2a",
                            "CurrentRole": "replica"
                        },
                        {
                            "CacheClusterId": "my-cluster-004",
                            "CacheNodeId": "0001",
                            "ReadEndpoint": {
                                "Address": "pat-cluster-004.xxxih.0001.usw2.cache.amazonaws.com",
                                "Port": 6379
                            },
                            "PreferredAvailabilityZone": "us-west-2a",
                            "CurrentRole": "replica"
                        }
                    ]
                }
            ],
            "AutomaticFailover": "disabled",
            "SnapshotRetentionLimit": 0,
            "SnapshotWindow": "07:30-08:30",
            "ClusterEnabled": false,
            "CacheNodeType": "cache.r5.xlarge",
            "AuthTokenEnabled": false,
            "TransitEncryptionEnabled": false,
            "AtRestEncryptionEnabled": false,
            "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxxx152:replicationgroup:my-cluster",
            "LogDeliveryConfigurations": [
                {
                    "LogType": "slow-log",
                    "DestinationType": "cloudwatch-logs",
                    "DestinationDetails": {
                        "CloudWatchLogsDetails": {
                            "LogGroup": "test-log"
                        }
                    },
                    "LogFormat": "json",
                    "Status": "active"
                }
            ]
        }
    ]
}

有关更多信息，请参阅《Elasticache 用户指南》中的管理集群。

有关API详细信息，请参阅 “DescribeReplicationGroups AWS CLI命令参考”。

以下代码示例显示了如何使用describe-reserved-cache-nodes-offerings。

AWS CLI

为了描述 reserved-cache-nodes-offerings

以下describe-reserved-cache-nodes-offerings示例返回 reserved-cache-node选项的详细信息。


aws elasticache describe-reserved-cache-nodes-offerings

输出：


{
    "ReservedCacheNodesOfferings": [
        {
            "ReservedCacheNodesOfferingId": "01ce0a19-a476-41cb-8aee-48eacbcdc8e5",
            "CacheNodeType": "cache.t3.small",
            "Duration": 31536000,
            "FixedPrice": 97.0,
            "UsagePrice": 0.0,
            "ProductDescription": "memcached",
            "OfferingType": "Partial Upfront",
            "RecurringCharges": [
                {
                    "RecurringChargeAmount": 0.011,
                    "RecurringChargeFrequency": "Hourly"
                }
            ]
        },
        {
            "ReservedCacheNodesOfferingId": "0443a27b-4da5-4b90-b92d-929fbd7abed2",
            "CacheNodeType": "cache.m3.2xlarge",
            "Duration": 31536000,
            "FixedPrice": 1772.0,
            "UsagePrice": 0.0,
            "ProductDescription": "redis",
            "OfferingType": "Heavy Utilization",
            "RecurringCharges": [
                {
                    "RecurringChargeAmount": 0.25,
                    "RecurringChargeFrequency": "Hourly"
                }
            ]
        },

        ...

    ]
}

有关更多信息，请参阅《Elasticache Redis 用户指南》中的 “获取有关预留节点产品的信息” 或《Elasticache Mem c ached 用户指南》中的 “获取有关预留节点产品的信息”。

有关API详细信息，请参阅 “DescribeReservedCacheNodesOfferings AWS CLI命令参考”。

以下代码示例显示了如何使用describe-reserved-cache-nodes。

AWS CLI

描述预留缓存节点

以下describe-reserved-cache-nodes示例返回有关此账户的预留缓存节点或有关指定预留缓存节点的信息。

aws 弹性疼痛 describe-reserved-cache-nodes

输出：


{
    "ReservedCacheNodes": [
        {
            "ReservedCacheNodeId": "mynode",
            "ReservedCacheNodesOfferingId": "xxxxxxxxx-xxxxx-xxxxx-xxxx-xxxxxxxx71",
            "CacheNodeType": "cache.t3.small",
            "StartTime": "2019-12-06T02:50:44.003Z",
            "Duration": 31536000,
            "FixedPrice": 0.0,
            "UsagePrice": 0.0,
            "CacheNodeCount": 1,
            "ProductDescription": "redis",
            "OfferingType": "No Upfront",
            "State": "payment-pending",
            "RecurringCharges": [
                {
                    "RecurringChargeAmount": 0.023,
                    "RecurringChargeFrequency": "Hourly"
                }
            ],
            "ReservationARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxxxx52:reserved-instance:mynode"
        }
    ]
}

有关更多信息，请参阅 Elasticache 用户指南中的使用预留节点管理成本。

有关API详细信息，请参阅 “DescribeReservedCacheNodes AWS CLI命令参考”。

以下代码示例显示了如何使用describe-service-updates。

AWS CLI

描述服务更新

以下describe-service-updates示例返回有关服务更新的详细信息。


aws elasticache describe-service-updates

输出：


{
     "ServiceUpdates": [
         {
             "ServiceUpdateName": "elc-xxxxxxxx7-001",
             "ServiceUpdateReleaseDate": "2019-10-09T16:00:00Z",
             "ServiceUpdateEndDate": "2020-02-09T15:59:59Z",
             "ServiceUpdateSeverity": "important",
             "ServiceUpdateRecommendedApplyByDate": "2019-11-08T15:59:59Z",
             "ServiceUpdateStatus": "available",
             "ServiceUpdateDescription": "Upgrades to improve the security, reliability, and operational performance of your ElastiCache nodes",
             "ServiceUpdateType": "security-update",
             "Engine": "redis, memcached",
             "EngineVersion": "redis 2.6.13 and onwards, memcached 1.4.5 and onwards",
             "AutoUpdateAfterRecommendedApplyByDate": false,
             "EstimatedUpdateTime": "30 minutes per node"
         },
         {
             "ServiceUpdateName": "elc-xxxxxxxx4-001",
             "ServiceUpdateReleaseDate": "2019-06-11T15:00:00Z",
             "ServiceUpdateEndDate": "2019-10-01T09:24:00Z",
             "ServiceUpdateSeverity": "important",
             "ServiceUpdateRecommendedApplyByDate": "2019-07-11T14:59:59Z",
             "ServiceUpdateStatus": "expired",
             "ServiceUpdateDescription": "Upgrades to improve the security, reliability, and operational performance of your ElastiCache nodes",
             "ServiceUpdateType": "security-update",
             "Engine": "redis",
             "EngineVersion": "redis 3.2.6, redis 4.0 and onwards",
             "AutoUpdateAfterRecommendedApplyByDate": false,
             "EstimatedUpdateTime": "30 minutes per node"
         }
     ]
 }

有关API详细信息，请参阅 “DescribeServiceUpdates AWS CLI命令参考”。

以下代码示例显示了如何使用describe-snapshots。

AWS CLI

描述快照

以下 “描述快照” 示例返回有关您的集群或复制组快照的信息。


aws elasticache describe-snapshots

输出：


{
    "Snapshots": [
        {
            "SnapshotName": "automatic.my-cluster2-002-2019-12-05-06-38",
            "CacheClusterId": "my-cluster2-002",
            "SnapshotStatus": "available",
            "SnapshotSource": "automated",
            "CacheNodeType": "cache.r5.large",
            "Engine": "redis",
            "EngineVersion": "5.0.5",
            "NumCacheNodes": 1,
            "PreferredAvailabilityZone": "us-west-2a",
            "CacheClusterCreateTime": "2019-11-26T01:22:52.396Z",
            "PreferredMaintenanceWindow": "mon:17:30-mon:18:30",
            "TopicArn": "arn:aws:sns:us-west-2:xxxxxxxxx52:My_Topic",
            "Port": 6379,
            "CacheParameterGroupName": "default.redis5.0",
            "CacheSubnetGroupName": "kxkxk",
            "VpcId": "vpc-a3e97cdb",
            "AutoMinorVersionUpgrade": true,
            "SnapshotRetentionLimit": 1,
            "SnapshotWindow": "06:30-07:30",
            "NodeSnapshots": [
                {
                    "CacheNodeId": "0001",
                    "CacheSize": "5 MB",
                    "CacheNodeCreateTime": "2019-11-26T01:22:52.396Z",
                    "SnapshotCreateTime": "2019-12-05T06:38:23Z"
                }
            ]
        },
        {
            "SnapshotName": "myreplica-backup",
            "CacheClusterId": "myreplica",
            "SnapshotStatus": "available",
            "SnapshotSource": "manual",
            "CacheNodeType": "cache.r5.large",
            "Engine": "redis",
            "EngineVersion": "5.0.5",
            "NumCacheNodes": 1,
            "PreferredAvailabilityZone": "us-west-2a",
            "CacheClusterCreateTime": "2019-11-26T00:14:52.439Z",
            "PreferredMaintenanceWindow": "sat:10:00-sat:11:00",
            "TopicArn": "arn:aws:sns:us-west-2:xxxxxxxxxx152:My_Topic",
            "Port": 6379,
            "CacheParameterGroupName": "default.redis5.0",
            "CacheSubnetGroupName": "kxkxk",
            "VpcId": "vpc-a3e97cdb",
            "AutoMinorVersionUpgrade": true,
            "SnapshotRetentionLimit": 0,
            "SnapshotWindow": "09:00-10:00",
            "NodeSnapshots": [
                {
                    "CacheNodeId": "0001",
                    "CacheSize": "5 MB",
                    "CacheNodeCreateTime": "2019-11-26T00:14:52.439Z",
                    "SnapshotCreateTime": "2019-11-26T00:25:01Z"
                }
            ]
        },
        {
            "SnapshotName": "my-cluster",
            "CacheClusterId": "my-cluster-003",
            "SnapshotStatus": "available",
            "SnapshotSource": "manual",
            "CacheNodeType": "cache.r5.large",
            "Engine": "redis",
            "EngineVersion": "5.0.5",
            "NumCacheNodes": 1,
            "PreferredAvailabilityZone": "us-west-2a",
            "CacheClusterCreateTime": "2019-11-25T23:56:17.186Z",
            "PreferredMaintenanceWindow": "sat:10:00-sat:11:00",
            "TopicArn": "arn:aws:sns:us-west-2:xxxxxxxxxx152:My_Topic",
            "Port": 6379,
            "CacheParameterGroupName": "default.redis5.0",
            "CacheSubnetGroupName": "kxkxk",
            "VpcId": "vpc-a3e97cdb",
            "AutoMinorVersionUpgrade": true,
            "SnapshotRetentionLimit": 0,
            "SnapshotWindow": "09:00-10:00",
            "NodeSnapshots": [
                {
                    "CacheNodeId": "0001",
                    "CacheSize": "5 MB",
                    "CacheNodeCreateTime": "2019-11-25T23:56:17.186Z",
                    "SnapshotCreateTime": "2019-11-26T03:08:33Z"
                }
            ]
        }
    ]
}

有关更多信息，请参阅《Elasticache 用户 ElastiCache 指南》中的 Redis 备份和恢复。

有关API详细信息，请参阅 “DescribeSnapshots AWS CLI命令参考”。

以下代码示例显示了如何使用describe-update-actions。

AWS CLI

描述更新操作

以下describe-update-actions示例返回更新操作的详细信息。


aws elasticache describe-update-actions

输出：


{
    "UpdateActions": [
        {
            "ReplicationGroupId": "mycluster",
            "ServiceUpdateName": "elc-20191007-001",
            "ServiceUpdateReleaseDate": "2019-10-09T16:00:00Z",
            "ServiceUpdateSeverity": "important",
            "ServiceUpdateStatus": "available",
            "ServiceUpdateRecommendedApplyByDate": "2019-11-08T15:59:59Z",
            "ServiceUpdateType": "security-update",
            "UpdateActionAvailableDate": "2019-12-05T19:15:19.995Z",
            "UpdateActionStatus": "complete",
            "NodesUpdated": "9/9",
            "UpdateActionStatusModifiedDate": "2019-12-05T19:15:20.461Z",
            "SlaMet": "n/a",
            "Engine": "redis"
        },
        {
            "CacheClusterId": "my-memcached-cluster",
            "ServiceUpdateName": "elc-20191007-001",
            "ServiceUpdateReleaseDate": "2019-10-09T16:00:00Z",
            "ServiceUpdateSeverity": "important",
            "ServiceUpdateStatus": "available",
            "ServiceUpdateRecommendedApplyByDate": "2019-11-08T15:59:59Z",
            "ServiceUpdateType": "security-update",
            "UpdateActionAvailableDate": "2019-12-04T18:26:05.349Z",
            "UpdateActionStatus": "complete",
            "NodesUpdated": "1/1",
            "UpdateActionStatusModifiedDate": "2019-12-04T18:26:05.352Z",
            "SlaMet": "n/a",
            "Engine": "redis"
        },
        {
            "ReplicationGroupId": "my-cluster",
            "ServiceUpdateName": "elc-20191007-001",
            "ServiceUpdateReleaseDate": "2019-10-09T16:00:00Z",
            "ServiceUpdateSeverity": "important",
            "ServiceUpdateStatus": "available",
            "ServiceUpdateRecommendedApplyByDate": "2019-11-08T15:59:59Z",
            "ServiceUpdateType": "security-update",
            "UpdateActionAvailableDate": "2019-11-26T03:36:26.320Z",
            "UpdateActionStatus": "complete",
            "NodesUpdated": "4/4",
            "UpdateActionStatusModifiedDate": "2019-12-04T22:11:12.664Z",
            "SlaMet": "n/a",
            "Engine": "redis"
        },
        {
            "ReplicationGroupId": "my-cluster2",
            "ServiceUpdateName": "elc-20191007-001",
            "ServiceUpdateReleaseDate": "2019-10-09T16:00:00Z",
            "ServiceUpdateSeverity": "important",
            "ServiceUpdateStatus": "available",
            "ServiceUpdateRecommendedApplyByDate": "2019-11-08T15:59:59Z",
            "ServiceUpdateType": "security-update",
            "UpdateActionAvailableDate": "2019-11-26T01:26:01.617Z",
            "UpdateActionStatus": "complete",
            "NodesUpdated": "3/3",
            "UpdateActionStatusModifiedDate": "2019-11-26T01:26:01.753Z",
            "SlaMet": "n/a",
            "Engine": "redis"
        }
    ]
}

有关更多信息，请参阅 Elasticache 用户指南 ElastiCache中的亚马逊自助服务更新。

有关API详细信息，请参阅 “DescribeUpdateActions AWS CLI命令参考”。

以下代码示例显示了如何使用describe-user-groups。

AWS CLI

描述用户组

以下describe-user-groups示例返回用户组列表。


aws elasticache describe-user-groups

输出：


{
    "UserGroups": [
        {
            "UserGroupId": "myusergroup",
            "Status": "active",
            "Engine": "redis",
            "UserIds": [
                "default"
            ],
            "ReplicationGroups": [],
            "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:usergroup:myusergroup"
        }
    ]
}

有关更多信息，请参阅《Elast icache 用户指南》中的使用基于角色的访问控制对用户进行身份验证 (RBAC)。

有关API详细信息，请参阅 “DescribeUserGroups AWS CLI命令参考”。

以下代码示例显示了如何使用describe-users。

AWS CLI

描述用户

以下describe-users示例返回用户列表。


aws elasticache describe-users

输出：


{
    "Users": [
        {
            "UserId": "default",
            "UserName": "default",
            "Status": "active",
            "Engine": "redis",
            "AccessString": "on ~* +@all",
            "UserGroupIds": [
                "myusergroup"
            ],
            "Authentication": {
                "Type": "no-password"
            },
            "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:user:default"
        },
        {
            "UserId": "user1",
            "UserName": "myUser",
            "Status": "active",
            "Engine": "redis",
            "AccessString": "on ~* +@all",
            "UserGroupIds": [],
            "Authentication": {
                "Type": "password",
                "PasswordCount": 1
            },
            "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:user:user1"
        },
        {
            "UserId": "user2",
            "UserName": "myUser",
            "Status": "active",
            "Engine": "redis",
            "AccessString": "on ~app::* -@all +@read +@hash +@bitmap +@geo -setbit -bitfield -hset -hsetnx -hmset -hincrby -hincrbyfloat -hdel -bitop -geoadd -georadius -georadiusbymember",
            "UserGroupIds": [],
            "Authentication": {
                "Type": "password",
                "PasswordCount": 1
            },
            "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:user:user2"
        }
    ]
}

有关更多信息，请参阅《Elast icache 用户指南》中的使用基于角色的访问控制对用户进行身份验证 (RBAC)。

有关API详细信息，请参阅 “DescribeUsers AWS CLI命令参考”。

以下代码示例显示了如何使用disassociate-global-replication-group。

AWS CLI

取消辅助群集与全局复制组的关联

以下disassociate-global-replication-group示例从全局数据存储中移除辅助群集


aws elasticache disassociate-global-replication-group \
    --global-replication-group-id my-grg \
    --replication-group-id my-cluster-grg-secondary \
    --replication-group-region us-east-1

输出：


{
    "GlobalReplicationGroup": {
        "GlobalReplicationGroupId": "my-grg",
        "GlobalReplicationGroupDescription": "my-grg",
        "Status": "modifying",
        "CacheNodeType": "cache.r5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.6",
        "Members": [
            {
                "ReplicationGroupId": "my-cluster-grg-secondary",
                "ReplicationGroupRegion": "us-east-1",
                "Role": "SECONDARY",
                "AutomaticFailover": "enabled",
                "Status": "associated"
            },
            {
                "ReplicationGroupId": "my-cluster-grg",
                "ReplicationGroupRegion": "us-west-2",
                "Role": "PRIMARY",
                "AutomaticFailover": "enabled",
                "Status": "associated"
            }
        ],
        "ClusterEnabled": false,
        "AuthTokenEnabled": false,
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Ela sticache 用户指南》中的使用全球数据存储跨 AWS 区域复制。

有关API详细信息，请参阅 “DisassociateGlobalReplicationGroup AWS CLI命令参考”。

以下代码示例显示了如何使用increase-node-groups-in-global-replication-group。

AWS CLI

增加全局复制组中的节点组数量

以下内容使用 Redis 引擎increase-node-groups-in-global-replication-group增加了节点组数量。


aws elasticache increase-node-groups-in-global-replication-group \
    --global-replication-group-id sgaui-pat-test-4 \
    --node-group-count 6 \
    --apply-immediately

输出：


{
    "GlobalReplicationGroup": {
        "GlobalReplicationGroupId": "sgaui-test-4",
        "GlobalReplicationGroupDescription": "test-4",
        "Status": "modifying",
        "CacheNodeType": "cache.r5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.6",
        "Members": [
            {
                "ReplicationGroupId": "my-cluster-b",
                "ReplicationGroupRegion": "us-east-1",
                "Role": "SECONDARY",
                "AutomaticFailover": "enabled",
                "Status": "associated"
            },
            {
                "ReplicationGroupId": "my-cluster-a",
                "ReplicationGroupRegion": "us-west-2",
                "Role": "PRIMARY",
                "AutomaticFailover": "enabled",
                "Status": "associated"
            }
        ],
        "ClusterEnabled": true,
        "GlobalNodeGroups": [
            {
                "GlobalNodeGroupId": "sgaui-test-4-0001",
                "Slots": "0-234,2420-5461"
            },
            {
                "GlobalNodeGroupId": "sgaui-test-4-0002",
                "Slots": "5462-5904,6997-9830"
            },
            {
                "GlobalNodeGroupId": "sgaui-test-4-0003",
                "Slots": "10923-11190,13375-16383"
            },
            {
                "GlobalNodeGroupId": "sgaui-test-4-0004",
                "Slots": "235-2419,5905-6996"
            },
            {
                "GlobalNodeGroupId": "sgaui-test-4-0005",
                "Slots": "9831-10922,11191-13374"
            }
        ],
        "AuthTokenEnabled": false,
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Ela sticache 用户指南》中的使用全球数据存储跨 AWS 区域复制。

有关API详细信息，请参阅 “IncreaseNodeGroupsInGlobalReplicationGroup AWS CLI命令参考”。

以下代码示例显示了如何使用increase-replica-count。

AWS CLI

增加副本数量

以下increase-replica-count示例做了两件事之一。它可以动态增加 Redis（已禁用集群模式）复制组中的副本数量。或者，它可以动态增加 Redis（已启用集群模式）复制组的一个或多个节点组（分片）中的副本节点数量。此操作是在没有集群停机时间的情况下执行的。


aws elasticache increase-replica-count \
    --replication-group-id "my-cluster" \
    --apply-immediately \
    --new-replica-count 3

输出：


{
     "ReplicationGroup": {
         "ReplicationGroupId": "my-cluster",
         "Description": " ",
         "Status": "modifying",
         "PendingModifiedValues": {},
         "MemberClusters": [
             "my-cluster-001",
             "my-cluster-002",
             "my-cluster-003",
             "my-cluster-004"
         ],
         "NodeGroups": [
             {
                 "NodeGroupId": "0001",
                 "Status": "modifying",
                 "PrimaryEndpoint": {
                     "Address": "my-cluster.xxxxxih.ng.0001.usw2.cache.amazonaws.com",
                     "Port": 6379
                 },
                 "ReaderEndpoint": {
                     "Address": "my-cluster-ro.xxxxxxih.ng.0001.usw2.cache.amazonaws.com",
                     "Port": 6379
                 },
                 "NodeGroupMembers": [
                     {
                         "CacheClusterId": "my-cluster-001",
                         "CacheNodeId": "0001",
                         "ReadEndpoint": {
                             "Address": "my-cluster-001.xxxxxih.0001.usw2.cache.amazonaws.com",
                             "Port": 6379
                         },
                         "PreferredAvailabilityZone": "us-west-2a",
                         "CurrentRole": "primary"
                     },
                     {
                         "CacheClusterId": "my-cluster-003",
                         "CacheNodeId": "0001",
                         "ReadEndpoint": {
                             "Address": "my-cluster-003.xxxxxih.0001.usw2.cache.amazonaws.com",
                             "Port": 6379
                         },
                         "PreferredAvailabilityZone": "us-west-2a",
                         "CurrentRole": "replica"
                     }
                 ]
             }
         ],
         "AutomaticFailover": "disabled",
         "SnapshotRetentionLimit": 0,
         "SnapshotWindow": "07:30-08:30",
         "ClusterEnabled": false,
         "CacheNodeType": "cache.r5.xlarge",
         "TransitEncryptionEnabled": false,
         "AtRestEncryptionEnabled": false
     }
 }

有关更多信息，请参阅 El astic ache 用户指南中的增加分片中的副本数量。

有关API详细信息，请参阅 “IncreaseReplicaCount AWS CLI命令参考”。

以下代码示例显示了如何使用list-allowed-node-type-modifications。

AWS CLI

列出允许的节点修改

以下list-allowed-node-type-modifications示例列出了您可以将 Redis 集群或复制组的当前节点类型扩展到的所有可用节点类型。


aws elasticache list-allowed-node-type-modifications \
    --replication-group-id "my-replication-group"

输出：


{
    "ScaleUpModifications": [
        "cache.m5.12xlarge",
        "cache.m5.24xlarge",
        "cache.m5.4xlarge",
        "cache.r5.12xlarge",
        "cache.r5.24xlarge",
        "cache.r5.2xlarge",
        "cache.r5.4xlarge"
    ],
    "ScaleDownModifications": [
        "cache.m3.large",
        "cache.m3.medium",
        "cache.m3.xlarge",
        "cache.m4.large",
        "cache.m4.xlarge",
        "cache.m5.2xlarge",
        "cache.m5.large",
        "cache.m5.xlarge",
        "cache.r3.large",
        "cache.r4.large",
        "cache.r4.xlarge",
        "cache.r5.large",
        "cache.t2.medium",
        "cache.t2.micro",
        "cache.t2.small",
        "cache.t3.medium",
        "cache.t3.micro",
        "cache.t3.small"
    ]
}

有关更多信息，请参阅 Elasticache 用户指南中的扩展 ElastiCache Redis 集群。

有关API详细信息，请参阅 “ListAllowedNodeTypeModifications AWS CLI命令参考”。

以下代码示例显示了如何使用list-tags-for-resource。

AWS CLI

列出资源的标签

以下list-tags-for-resource示例列出了资源的标签。


aws elasticache list-tags-for-resource \
    --resource-name "arn:aws:elasticache:us-east-1:123456789012:cluster:my-cluster"

输出：


{
    "TagList": [
        {
            "Key": "Project",
            "Value": "querySpeedUp"
        },
        {
            "Key": "Environment",
            "Value": "PROD"
        }
    ]
}

有关更多信息，请参阅《Elasticache 用户 AWS CLI指南》中的使用列出标签。

有关API详细信息，请参阅 “ListTagsForResource AWS CLI命令参考”。

以下代码示例显示了如何使用modify-cache-cluster。

AWS CLI

修改缓存集群

以下modify-cache-cluster示例修改了指定集群的设置。


aws elasticache modify-cache-cluster \
    --cache-cluster-id "my-cluster" \
    --num-cache-nodes 1

输出：


{
    "CacheCluster": {
        "CacheClusterId": "my-cluster",
        "ClientDownloadLandingPage": "https://console.aws.amazon.com/elasticache/home#client-download:",
        "CacheNodeType": "cache.m5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.5",
        "CacheClusterStatus": "available",
        "NumCacheNodes": 1,
        "PreferredAvailabilityZone": "us-west-2c",
        "CacheClusterCreateTime": "2019-12-04T18:24:56.652Z",
        "PreferredMaintenanceWindow": "sat:10:00-sat:11:00",
        "PendingModifiedValues": {},
        "CacheSecurityGroups": [],
        "CacheParameterGroup": {
            "CacheParameterGroupName": "default.redis5.0",
            "ParameterApplyStatus": "in-sync",
            "CacheNodeIdsToReboot": []
        },
        "CacheSubnetGroupName": "default",
        "AutoMinorVersionUpgrade": true,
        "SnapshotRetentionLimit": 0,
        "SnapshotWindow": "07:00-08:00",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅 Elasticache 用户指南中的修改 ElastiCache 集群。

有关API详细信息，请参阅 “ModifyCacheCluster AWS CLI命令参考”。

以下代码示例显示了如何使用modify-cache-parameter-group。

AWS CLI

修改缓存参数组

以下modify-cache-parameter-group示例修改了指定缓存参数组的参数。


aws elasticache modify-cache-parameter-group \
    --cache-parameter-group-name "mygroup" \
    --parameter-name-values "ParameterName=activedefrag, ParameterValue=no"

输出：


{
    "CacheParameterGroupName": "mygroup"
}

有关更多信息，请参阅 Elasticache 用户指南中的修改参数组。

有关API详细信息，请参阅 “ModifyCacheParameterGroup AWS CLI命令参考”。

以下代码示例显示了如何使用modify-cache-subnet-group。

AWS CLI

修改缓存子网组

以下modify-cache-subnet-group示例修改了指定的缓存子网组。


aws elasticache modify-cache-subnet-group \
    --cache-subnet-group-name kxkxk \
    --cache-subnet-group-description "mygroup"

输出：


{
    "CacheSubnetGroup": {
        "CacheSubnetGroupName": "kxkxk",
        "CacheSubnetGroupDescription": "mygroup",
        "VpcId": "vpc-xxxxcdb",
        "Subnets": [
            {
                "SubnetIdentifier": "subnet-xxxxbff",
                "SubnetAvailabilityZone": {
                    "Name": "us-west-2a"
                }
            }
        ]
    }
}

有关更多信息，请参阅 Elasticache 用户指南中的修改子网组。

有关API详细信息，请参阅 “ModifyCacheSubnetGroup AWS CLI命令参考”。

以下代码示例显示了如何使用modify-global-replication-group。

AWS CLI

修改全局复制组

以下内容使用 Redis 引擎modify-global-replication-group修改全局复制组的属性，在本例中为禁用自动故障转移。


aws elasticache modify-global-replication-group \
    --global-replication-group-id sgaui-pat-group \
    --apply-immediately \
    --no-automatic-failover-enabled

输出


{
    "GlobalReplicationGroup": {
        "GlobalReplicationGroupId": "sgaui-test-group",
        "GlobalReplicationGroupDescription": " ",
        "Status": "modifying",
        "CacheNodeType": "cache.r5.large",
        "Engine": "redis",
        "EngineVersion": "5.0.6",
        "ClusterEnabled": false,
        "AuthTokenEnabled": false,
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Ela sticache 用户指南》中的使用全球数据存储跨 AWS 区域复制。

有关API详细信息，请参阅 “ModifyGlobalReplicationGroup AWS CLI命令参考”。

以下代码示例显示了如何使用modify-replication-group-shard-configuration。

AWS CLI

修改复制组分片配置

以下方法使用 Redis 引擎modify-replication-group-shard-configuration减少了节点组数量。


aws elasticache modify-replication-group-shard-configuration \
    --replication-group-id mycluster \
    --node-group-count 3 \
    --apply-immediately \
    --node-groups-to-remove 0002

输出


{
    "ReplicationGroup": {
        "ReplicationGroupId": "mycluster",
        "Description": "mycluster",
        "GlobalReplicationGroupInfo": {},
        "Status": "modifying",
        "PendingModifiedValues": {},
        "MemberClusters": [
            "mycluster-0002-001",
            "mycluster-0002-002",
            "mycluster-0002-003",
            "mycluster-0003-001",
            "mycluster-0003-002",
            "mycluster-0003-003",
            "mycluster-0003-004",
            "mycluster-0004-001",
            "mycluster-0004-002",
            "mycluster-0004-003",
            "mycluster-0005-001",
            "mycluster-0005-002",
            "mycluster-0005-003"
        ],
        "NodeGroups": [
            {
                "NodeGroupId": "0002",
                "Status": "modifying",
                "Slots": "894-1767,3134-4443,5149-5461,6827-7332,12570-13662",
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "mycluster-0002-001",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2c"
                    },
                    {
                        "CacheClusterId": "mycluster-0002-002",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2a"
                    },
                    {
                        "CacheClusterId": "mycluster-0002-003",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2b"
                    }
                ]
            },
            {
                "NodeGroupId": "0003",
                "Status": "modifying",
                "Slots": "0-324,5462-5692,6784-6826,7698-8191,10923-11075,12441-12569,13663-16383",
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "mycluster-0003-001",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2c"
                    },
                    {
                        "CacheClusterId": "mycluster-0003-002",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2b"
                    },
                    {
                        "CacheClusterId": "mycluster-0003-003",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2a"
                    },
                    {
                        "CacheClusterId": "mycluster-0003-004",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2c"
                    }
                ]
            },
            {
                "NodeGroupId": "0004",
                "Status": "modifying",
                "Slots": "325-336,4706-5148,7333-7697,9012-10922,11076-12440",
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "mycluster-0004-001",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2b"
                    },
                    {
                        "CacheClusterId": "mycluster-0004-002",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2a"
                    },
                    {
                        "CacheClusterId": "mycluster-0004-003",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2c"
                    }
                ]
            },
            {
                "NodeGroupId": "0005",
                "Status": "modifying",
                "Slots": "337-893,1768-3133,4444-4705,5693-6783,8192-9011",
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "mycluster-0005-001",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2a"
                    },
                    {
                        "CacheClusterId": "mycluster-0005-002",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2c"
                    },
                    {
                        "CacheClusterId": "mycluster-0005-003",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2b"
                    }
                ]
            }
        ],
        "AutomaticFailover": "enabled",
        "MultiAZ": "enabled",
        "ConfigurationEndpoint": {
            "Address": "mycluster.g2xbih.clustercfg.usw2.cache.amazonaws.com",
            "Port": 6379
        },
        "SnapshotRetentionLimit": 1,
        "SnapshotWindow": "13:00-14:00",
        "ClusterEnabled": true,
        "CacheNodeType": "cache.r5.xlarge",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅 Elasticache 用户指南中的扩展 ElastiCache Redis 集群。

有关API详细信息，请参阅 “ModifyReplicationGroupShardConfiguration AWS CLI命令参考”。

以下代码示例显示了如何使用modify-replication-group。

AWS CLI

修改复制组

以下内容modify-replication-group禁用使用 Redis 引擎的多可用区。


aws elasticache modify-replication-group \
    --replication-group-id test-cluster \
    --no-multi-az-enabled \
    --apply-immediately

输出


{
    "ReplicationGroup": {
        "ReplicationGroupId": "test-cluster",
        "Description": "test-cluster",
        "GlobalReplicationGroupInfo": {
            "GlobalReplicationGroupId": "sgaui-pat-group",
            "GlobalReplicationGroupMemberRole": "PRIMARY"
        },
        "Status": "available",
        "PendingModifiedValues": {},
        "MemberClusters": [
            "test-cluster-001",
            "test-cluster-002",
            "test-cluster-003"
        ],
        "NodeGroups": [
            {
                "NodeGroupId": "0001",
                "Status": "available",
                "PrimaryEndpoint": {
                    "Address": "test-cluster.g2xbih.ng.0001.usw2.cache.amazonaws.com",
                    "Port": 6379
                },
                "ReaderEndpoint": {
                    "Address": "test-cluster-ro.g2xbih.ng.0001.usw2.cache.amazonaws.com",
                    "Port": 6379
                },
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "test-cluster-001",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "test-cluster-001.g2xbih.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2c",
                        "CurrentRole": "primary"
                    },
                    {
                        "CacheClusterId": "test-cluster-002",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "test-cluster-002.g2xbih.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2b",
                        "CurrentRole": "replica"
                    },
                    {
                        "CacheClusterId": "test-cluster-003",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "test-cluster-003.g2xbih.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2a",
                        "CurrentRole": "replica"
                    }
                ]
            }
        ],
        "SnapshottingClusterId": "test-cluster-002",
        "AutomaticFailover": "enabled",
        "MultiAZ": "disabled",
        "SnapshotRetentionLimit": 1,
        "SnapshotWindow": "08:00-09:00",
        "ClusterEnabled": false,
        "CacheNodeType": "cache.r5.large",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Elasticache 用户指南》中的修改复制组。

有关API详细信息，请参阅 “ModifyReplicationGroup AWS CLI命令参考”。

以下代码示例显示了如何使用modify-user-group。

AWS CLI

修改用户组

以下modify-user-group示例将用户添加到用户组。


aws elasticache modify-user-group \
    --user-group-id myusergroup \
    --user-ids-to-add user1

输出：


{
    "UserGroupId": "myusergroup",
    "Status": "modifying",
    "Engine": "redis",
    "UserIds": [
        "default"
    ],
    "PendingChanges": {
        "UserIdsToAdd": [
            "user1"
        ]
    },
    "ReplicationGroups": [],
    "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:usergroup:myusergroup"
}

有关更多信息，请参阅《Elast icache 用户指南》中的使用基于角色的访问控制对用户进行身份验证 (RBAC)。

有关API详细信息，请参阅 “ModifyUserGroup AWS CLI命令参考”。

以下代码示例显示了如何使用modify-user。

AWS CLI

修改用户

以下modify-user示例修改了用户的访问字符串。


aws elasticache modify-user \
    --user-id user2 \
    --append-access-string "on ~* +@all"

输出：


{
    "UserId": "user2",
    "UserName": "myUser",
    "Status": "modifying",
    "Engine": "redis",
    "AccessString": "on ~* +@all",
    "UserGroupIds": [],
    "Authentication": {
        "Type": "password",
        "PasswordCount": 1
    },
    "ARN": "arn:aws:elasticache:us-west-2:xxxxxxxxxx52:user:user2"
}

有关更多信息，请参阅《Elast icache 用户指南》中的使用基于角色的访问控制对用户进行身份验证 (RBAC)。

有关API详细信息，请参阅 “ModifyUser AWS CLI命令参考”。

以下代码示例显示了如何使用purchase-reserved-cache-nodes-offering。

AWS CLI

要购买 reserved-cache-node-offering

以下purchase-reserved-cache-nodes-offering示例允许您购买预留缓存节点产品。


aws elasticache purchase-reserved-cache-nodes-offering \
    --reserved-cache-nodes-offering-id xxxxxxx-4da5-4b90-b92d-929fbd7abed2

输出


{
    "ReservedCacheNode": {
        "ReservedCacheNodeId": "ri-2020-06-30-17-59-40-474",
        "ReservedCacheNodesOfferingId": "xxxxxxx-4da5-4b90-b92d-929fbd7abed2",
        "CacheNodeType": "cache.m3.2xlarge",
        "StartTime": "2020-06-30T17:59:40.474000+00:00",
        "Duration": 31536000,
        "FixedPrice": 1772.0,
        "UsagePrice": 0.0,
        "CacheNodeCount": 1,
        "ProductDescription": "redis",
        "OfferingType": "Heavy Utilization",
        "State": "payment-pending",
        "RecurringCharges": [
            {
                "RecurringChargeAmount": 0.25,
                "RecurringChargeFrequency": "Hourly"
            }
        ]
    }
}

有关API详细信息，请参阅 “PurchaseReservedCacheNodesOffering AWS CLI命令参考”。

以下代码示例显示了如何使用reboot-cache-cluster。

AWS CLI

重启缓存集群

以下reboot-cache-cluster示例重新启动已配置集群中的部分或全部缓存节点。此操作将所有修改过的缓存参数组应用于集群。重启操作会尽快进行，并导致集群暂时中断。在重启期间，群集状态设置为REBOOTING。


aws elasticache reboot-cache-cluster \
    --cache-cluster-id "my-cluster-001" \
    --cache-node-ids-to-reboot "0001"

输出：


{
    "CacheCluster": {
        "CacheClusterId": "my-cluster-001",
        "ClientDownloadLandingPage": "https://console.aws.amazon.com/elasticache/home#client-download:",
        "CacheNodeType": "cache.r5.xlarge",
        "Engine": "redis",
        "EngineVersion": "5.0.5",
        "CacheClusterStatus": "rebooting cache cluster nodes",
        "NumCacheNodes": 1,
        "PreferredAvailabilityZone": "us-west-2a",
        "CacheClusterCreateTime": "2019-11-26T03:35:04.546Z",
        "PreferredMaintenanceWindow": "mon:04:05-mon:05:05",
        "PendingModifiedValues": {},
        "NotificationConfiguration": {
            "TopicArn": "arn:aws:sns:us-west-2:xxxxxxxxxx152:My_Topic",
            "TopicStatus": "active"
        },
        "CacheSecurityGroups": [],
        "CacheParameterGroup": {
            "CacheParameterGroupName": "mygroup",
            "ParameterApplyStatus": "in-sync",
            "CacheNodeIdsToReboot": []
        },
        "CacheSubnetGroupName": "kxkxk",
        "AutoMinorVersionUpgrade": true,
        "SecurityGroups": [
            {
                "SecurityGroupId": "sg-xxxxxxxxxxxxx836",
                "Status": "active"
            },
            {
                "SecurityGroupId": "sg-xxxxxxxx7b",
                "Status": "active"
            }
        ],
        "ReplicationGroupId": "my-cluster",
        "SnapshotRetentionLimit": 0,
        "SnapshotWindow": "07:30-08:30",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅 Elasticache 用户指南中的重启集群 < https://docs.aws.amazon.com/AmazonElastiCache/ latest/red-ug/Clusters .rebooting.html。

有关API详细信息，请参阅 “RebootCacheCluster AWS CLI命令参考”。

以下代码示例显示了如何使用reset-cache-parameter-group。

AWS CLI

重置缓存参数组

以下reset-cache-parameter-group示例将缓存参数组的参数修改为引擎或系统的默认值。您可以通过提交参数名称列表来重置特定参数。要重置整个缓存参数组，请指定--reset-all-parameters和--cache-parameter-group-name参数。


aws elasticache reset-cache-parameter-group \
    --cache-parameter-group-name "mygroup" \
    --reset-all-parameters

输出：


{
    "CacheParameterGroupName": "mygroup"
}

有关API详细信息，请参阅 “ResetCacheParameterGroup AWS CLI命令参考”。

以下代码示例显示了如何使用start-migration。

AWS CLI

开始迁移

以下内容使用 Redis start-migration 引擎将您的数据从亚马逊上的自托管 Redis 迁移到EC2亚马逊 ElastiCache。


aws elasticache start-migration \
   --replication-group-id test \
   --customer-node-endpoint-list "Address='test.g2xbih.ng.0001.usw2.cache.amazonaws.com',Port=6379"

输出


{
    "ReplicationGroup": {
        "ReplicationGroupId": "test",
        "Description": "test",
        "GlobalReplicationGroupInfo": {},
        "Status": "modifying",
        "PendingModifiedValues": {},
        "MemberClusters": [
            "test-001",
            "test-002",
            "test-003"
        ],
        "NodeGroups": [
            {
                "NodeGroupId": "0001",
                "Status": "available",
                "PrimaryEndpoint": {
                    "Address": "test.g2xbih.ng.0001.usw2.cache.amazonaws.com",
                    "Port": 6379
                },
                "ReaderEndpoint": {
                    "Address": "test-ro.g2xbih.ng.0001.usw2.cache.amazonaws.com",
                    "Port": 6379
                },
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "test-001",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "test-001.g2xbih.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2a",
                        "CurrentRole": "primary"
                    },
                    {
                        "CacheClusterId": "test-002",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "test-002.g2xbih.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2c",
                        "CurrentRole": "replica"
                    },
                    {
                        "CacheClusterId": "test-003",
                        "CacheNodeId": "0001",
                        "ReadEndpoint": {
                            "Address": "test-003.g2xbih.0001.usw2.cache.amazonaws.com",
                            "Port": 6379
                        },
                        "PreferredAvailabilityZone": "us-west-2b",
                        "CurrentRole": "replica"
                    }
                ]
            }
        ],
        "SnapshottingClusterId": "test-002",
        "AutomaticFailover": "enabled",
        "MultiAZ": "enabled",
        "SnapshotRetentionLimit": 1,
        "SnapshotWindow": "07:30-08:30",
        "ClusterEnabled": false,
        "CacheNodeType": "cache.r5.large",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关更多信息，请参阅《Elasticache 用户指南》 ElastiCache中的在线迁移到。

有关API详细信息，请参阅 “StartMigration AWS CLI命令参考”。

以下代码示例显示了如何使用test-failover。

AWS CLI

测试节点组的故障转移

以下test-failover示例测试复制组（在控制台中称为群集）中指定节点组（在控制台中称为分片）上的自动故障转移。


aws elasticache test-failover /
    --replication-group-id "mycluster" /
    --node-group-id "0001"

输出：


{
    "ReplicationGroup": {
        "ReplicationGroupId": "mycluster",
        "Description": "My Cluster",
        "Status": "available",
        "PendingModifiedValues": {},
        "MemberClusters": [
            "mycluster-0001-001",
            "mycluster-0001-002",
            "mycluster-0001-003",
            "mycluster-0002-001",
            "mycluster-0002-002",
            "mycluster-0002-003",
            "mycluster-0003-001",
            "mycluster-0003-002",
            "mycluster-0003-003"
        ],
        "NodeGroups": [
            {
                "NodeGroupId": "0001",
                "Status": "available",
                "Slots": "0-5461",
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "mycluster-0001-001",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2b"
                    },
                    {
                        "CacheClusterId": "mycluster-0001-002",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2a"
                    },
                    {
                        "CacheClusterId": "mycluster-0001-003",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2c"
                    }
                ]
            },
            {
                "NodeGroupId": "0002",
                "Status": "available",
                "Slots": "5462-10922",
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "mycluster-0002-001",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2a"
                    },
                    {
                        "CacheClusterId": "mycluster-0002-002",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2b"
                    },
                    {
                        "CacheClusterId": "mycluster-0002-003",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2c"
                    }
                ]
            },
            {
                "NodeGroupId": "0003",
                "Status": "available",
                "Slots": "10923-16383",
                "NodeGroupMembers": [
                    {
                        "CacheClusterId": "mycluster-0003-001",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2c"
                    },
                    {
                        "CacheClusterId": "mycluster-0003-002",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2b"
                    },
                    {
                        "CacheClusterId": "mycluster-0003-003",
                        "CacheNodeId": "0001",
                        "PreferredAvailabilityZone": "us-west-2a"
                    }
                ]
            }
        ],
        "AutomaticFailover": "enabled",
        "ConfigurationEndpoint": {
            "Address": "mycluster.xxxxih.clustercfg.usw2.cache.amazonaws.com",
            "Port": 6379
        },
        "SnapshotRetentionLimit": 1,
        "SnapshotWindow": "13:00-14:00",
        "ClusterEnabled": true,
        "CacheNodeType": "cache.r5.large",
        "TransitEncryptionEnabled": false,
        "AtRestEncryptionEnabled": false
    }
}

有关API详细信息，请参阅 “TestFailover AWS CLI命令参考”。

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