CfnReplicationGroup
- class aws_cdk.aws_elasticache.CfnReplicationGroup(scope, id, *, replication_group_description, at_rest_encryption_enabled=None, auth_token=None, automatic_failover_enabled=None, auto_minor_version_upgrade=None, cache_node_type=None, cache_parameter_group_name=None, cache_security_group_names=None, cache_subnet_group_name=None, cluster_mode=None, data_tiering_enabled=None, engine=None, engine_version=None, global_replication_group_id=None, ip_discovery=None, kms_key_id=None, log_delivery_configurations=None, multi_az_enabled=None, network_type=None, node_group_configuration=None, notification_topic_arn=None, num_cache_clusters=None, num_node_groups=None, port=None, preferred_cache_cluster_a_zs=None, preferred_maintenance_window=None, primary_cluster_id=None, replicas_per_node_group=None, replication_group_id=None, security_group_ids=None, snapshot_arns=None, snapshot_name=None, snapshot_retention_limit=None, snapshotting_cluster_id=None, snapshot_window=None, tags=None, transit_encryption_enabled=None, transit_encryption_mode=None, user_group_ids=None)
Bases:
CfnResource
A CloudFormation
AWS::ElastiCache::ReplicationGroup
.The
AWS::ElastiCache::ReplicationGroup
resource creates an Amazon ElastiCache Redis replication group. A Redis (cluster mode disabled) replication group is a collection of cache clusters, where one of the clusters is a primary read-write cluster and the others are read-only replicas.A Redis (cluster mode enabled) cluster is comprised of from 1 to 90 shards (API/CLI: node groups). Each shard has a primary node and up to 5 read-only replica nodes. The configuration can range from 90 shards and 0 replicas to 15 shards and 5 replicas, which is the maximum number or replicas allowed.
The node or shard limit can be increased to a maximum of 500 per cluster if the Redis engine version is 5.0.6 or higher. For example, you can choose to configure a 500 node cluster that ranges between 83 shards (one primary and 5 replicas per shard) and 500 shards (single primary and no replicas). Make sure there are enough available IP addresses to accommodate the increase. Common pitfalls include the subnets in the subnet group have too small a CIDR range or the subnets are shared and heavily used by other clusters. For more information, see Creating a Subnet Group . For versions below 5.0.6, the limit is 250 per cluster.
To request a limit increase, see Amazon Service Limits and choose the limit type Nodes per cluster per instance type .
- CloudformationResource:
AWS::ElastiCache::ReplicationGroup
- Link:
- ExampleMetadata:
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_elasticache as elasticache cfn_replication_group = elasticache.CfnReplicationGroup(self, "MyCfnReplicationGroup", replication_group_description="replicationGroupDescription", # the properties below are optional at_rest_encryption_enabled=False, auth_token="authToken", automatic_failover_enabled=False, auto_minor_version_upgrade=False, cache_node_type="cacheNodeType", cache_parameter_group_name="cacheParameterGroupName", cache_security_group_names=["cacheSecurityGroupNames"], cache_subnet_group_name="cacheSubnetGroupName", cluster_mode="clusterMode", data_tiering_enabled=False, engine="engine", engine_version="engineVersion", global_replication_group_id="globalReplicationGroupId", ip_discovery="ipDiscovery", kms_key_id="kmsKeyId", log_delivery_configurations=[elasticache.CfnReplicationGroup.LogDeliveryConfigurationRequestProperty( destination_details=elasticache.CfnReplicationGroup.DestinationDetailsProperty( cloud_watch_logs_details=elasticache.CfnReplicationGroup.CloudWatchLogsDestinationDetailsProperty( log_group="logGroup" ), kinesis_firehose_details=elasticache.CfnReplicationGroup.KinesisFirehoseDestinationDetailsProperty( delivery_stream="deliveryStream" ) ), destination_type="destinationType", log_format="logFormat", log_type="logType" )], multi_az_enabled=False, network_type="networkType", node_group_configuration=[elasticache.CfnReplicationGroup.NodeGroupConfigurationProperty( node_group_id="nodeGroupId", primary_availability_zone="primaryAvailabilityZone", replica_availability_zones=["replicaAvailabilityZones"], replica_count=123, slots="slots" )], notification_topic_arn="notificationTopicArn", num_cache_clusters=123, num_node_groups=123, port=123, preferred_cache_cluster_aZs=["preferredCacheClusterAZs"], preferred_maintenance_window="preferredMaintenanceWindow", primary_cluster_id="primaryClusterId", replicas_per_node_group=123, replication_group_id="replicationGroupId", security_group_ids=["securityGroupIds"], snapshot_arns=["snapshotArns"], snapshot_name="snapshotName", snapshot_retention_limit=123, snapshotting_cluster_id="snapshottingClusterId", snapshot_window="snapshotWindow", tags=[CfnTag( key="key", value="value" )], transit_encryption_enabled=False, transit_encryption_mode="transitEncryptionMode", user_group_ids=["userGroupIds"] )
Create a new
AWS::ElastiCache::ReplicationGroup
.- Parameters:
scope (
Construct
) –scope in which this resource is defined.
id (
str
) –scoped id of the resource.
replication_group_description (
str
) – A user-created description for the replication group.at_rest_encryption_enabled (
Union
[bool
,IResolvable
,None
]) – A flag that enables encryption at rest when set totrue
. You cannot modify the value ofAtRestEncryptionEnabled
after the replication group is created. To enable encryption at rest on a replication group you must setAtRestEncryptionEnabled
totrue
when you create the replication group. Required: Only available when creating a replication group in an Amazon VPC using redis version3.2.6
or4.x
onward. Default:false
auth_token (
Optional
[str
]) – Reserved parameter. The password used to access a password protected server.AuthToken
can be specified only on replication groups whereTransitEncryptionEnabled
istrue
. For more information, see Authenticating Users with the Redis AUTH Command . .. epigraph:: For HIPAA compliance, you must specifyTransitEncryptionEnabled
astrue
, anAuthToken
, and aCacheSubnetGroup
. Password constraints: - Must be only printable ASCII characters. - Must be at least 16 characters and no more than 128 characters in length. - Nonalphanumeric characters are restricted to (!, &, #, $, ^, <, >, -, ). For more information, see AUTH password at http://redis.io/commands/AUTH. .. epigraph:: If ADDING the AuthToken, update requires Replacement .automatic_failover_enabled (
Union
[bool
,IResolvable
,None
]) – Specifies whether a read-only replica is automatically promoted to read/write primary if the existing primary fails.AutomaticFailoverEnabled
must be enabled for Redis (cluster mode enabled) replication groups. Default: falseauto_minor_version_upgrade (
Union
[bool
,IResolvable
,None
]) – If you are running Redis engine version 6.0 or later, set this parameter to yes if you want to opt-in to the next minor version upgrade campaign. This parameter is disabled for previous versions.cache_node_type (
Optional
[str
]) – The compute and memory capacity of the nodes in the node group (shard). The following node types are supported by ElastiCache. Generally speaking, the current generation types provide more memory and computational power at lower cost when compared to their equivalent previous generation counterparts. - General purpose: - Current generation: M6g node types:cache.m6g.large
,cache.m6g.xlarge
,cache.m6g.2xlarge
,cache.m6g.4xlarge
,cache.m6g.12xlarge
,cache.m6g.24xlarge
M5 node types:cache.m5.large
,cache.m5.xlarge
,cache.m5.2xlarge
,cache.m5.4xlarge
,cache.m5.12xlarge
,cache.m5.24xlarge
M4 node types:cache.m4.large
,cache.m4.xlarge
,cache.m4.2xlarge
,cache.m4.4xlarge
,cache.m4.10xlarge
T4g node types:cache.t4g.micro
,cache.t4g.small
,cache.t4g.medium
T3 node types:cache.t3.micro
,cache.t3.small
,cache.t3.medium
T2 node types:cache.t2.micro
,cache.t2.small
,cache.t2.medium
- Previous generation: (not recommended) T1 node types:cache.t1.micro
M1 node types:cache.m1.small
,cache.m1.medium
,cache.m1.large
,cache.m1.xlarge
M3 node types:cache.m3.medium
,cache.m3.large
,cache.m3.xlarge
,cache.m3.2xlarge
- Compute optimized: - Previous generation: (not recommended) C1 node types:cache.c1.xlarge
- Memory optimized: - Current generation: R6gd node types:cache.r6gd.xlarge
,cache.r6gd.2xlarge
,cache.r6gd.4xlarge
,cache.r6gd.8xlarge
,cache.r6gd.12xlarge
,cache.r6gd.16xlarge
.. epigraph:: Ther6gd
family is available in the following regions:us-east-2
,us-east-1
,us-west-2
,us-west-1
,eu-west-1
,eu-central-1
,ap-northeast-1
,ap-southeast-1
,ap-southeast-2
. R6g node types:cache.r6g.large
,cache.r6g.xlarge
,cache.r6g.2xlarge
,cache.r6g.4xlarge
,cache.r6g.12xlarge
,cache.r6g.24xlarge
R5 node types:cache.r5.large
,cache.r5.xlarge
,cache.r5.2xlarge
,cache.r5.4xlarge
,cache.r5.12xlarge
,cache.r5.24xlarge
R4 node types:cache.r4.large
,cache.r4.xlarge
,cache.r4.2xlarge
,cache.r4.4xlarge
,cache.r4.8xlarge
,cache.r4.16xlarge
- Previous generation: (not recommended) M2 node types:cache.m2.xlarge
,cache.m2.2xlarge
,cache.m2.4xlarge
R3 node types:cache.r3.large
,cache.r3.xlarge
,cache.r3.2xlarge
,cache.r3.4xlarge
,cache.r3.8xlarge
For region availability, see Supported Node Types by Amazon Regioncache_parameter_group_name (
Optional
[str
]) – The name of the parameter group to associate with this replication group. If this argument is omitted, the default cache parameter group for the specified engine is used. If you are running Redis version 3.2.4 or later, only one node group (shard), and want to use a default parameter group, we recommend that you specify the parameter group by name. - To create a Redis (cluster mode disabled) replication group, useCacheParameterGroupName=default.redis3.2
. - To create a Redis (cluster mode enabled) replication group, useCacheParameterGroupName=default.redis3.2.cluster.on
.cache_security_group_names (
Optional
[Sequence
[str
]]) – A list of cache security group names to associate with this replication group.cache_subnet_group_name (
Optional
[str
]) – The name of the cache subnet group to be used for the replication group. .. epigraph:: If you’re going to launch your cluster in an Amazon VPC, you need to create a subnet group before you start creating a cluster. For more information, see AWS::ElastiCache::SubnetGroup .cluster_mode (
Optional
[str
]) – Enabled or Disabled. To modify cluster mode from Disabled to Enabled, you must first set the cluster mode to Compatible. Compatible mode allows your Redis clients to connect using both cluster mode enabled and cluster mode disabled. After you migrate all Redis clients to use cluster mode enabled, you can then complete cluster mode configuration and set the cluster mode to Enabled. For more information, see Modify cluster mode .data_tiering_enabled (
Union
[bool
,IResolvable
,None
]) – Enables data tiering. Data tiering is only supported for replication groups using the r6gd node type. This parameter must be set to true when using r6gd nodes. For more information, see Data tiering .engine (
Optional
[str
]) – The name of the cache engine to be used for the clusters in this replication group. The value must be set toRedis
.engine_version (
Optional
[str
]) – The version number of the cache engine to be used for the clusters in this replication group. To view the supported cache engine versions, use theDescribeCacheEngineVersions
operation. Important: You can upgrade to a newer engine version (see Selecting a Cache Engine and Version ) in the ElastiCache User Guide , but you cannot downgrade to an earlier engine version. If you want to use an earlier engine version, you must delete the existing cluster or replication group and create it anew with the earlier engine version.global_replication_group_id (
Optional
[str
]) – The name of the Global datastore.ip_discovery (
Optional
[str
]) – The network type you choose when creating a replication group, eitheripv4
|ipv6
. IPv6 is supported for workloads using Redis engine version 6.2 onward or Memcached engine version 1.6.6 on all instances built on the Nitro system .kms_key_id (
Optional
[str
]) – The ID of the KMS key used to encrypt the disk on the cluster.log_delivery_configurations (
Union
[IResolvable
,Sequence
[Union
[IResolvable
,LogDeliveryConfigurationRequestProperty
,Dict
[str
,Any
]]],None
]) – Specifies the destination, format and type of the logs.multi_az_enabled (
Union
[bool
,IResolvable
,None
]) – A flag indicating if you have Multi-AZ enabled to enhance fault tolerance. For more information, see Minimizing Downtime: Multi-AZ .network_type (
Optional
[str
]) –Must be either
ipv4
|ipv6
|dual_stack
. IPv6 is supported for workloads using Redis engine version 6.2 onward or Memcached engine version 1.6.6 on all instances built on the Nitro system .node_group_configuration (
Union
[IResolvable
,Sequence
[Union
[IResolvable
,NodeGroupConfigurationProperty
,Dict
[str
,Any
]]],None
]) –NodeGroupConfiguration
is a property of theAWS::ElastiCache::ReplicationGroup
resource that configures an Amazon ElastiCache (ElastiCache) Redis cluster node group. If you set UseOnlineResharding totrue
, you can updateNodeGroupConfiguration
without interruption. WhenUseOnlineResharding
is set tofalse
, or is not specified, updatingNodeGroupConfiguration
results in replacement .notification_topic_arn (
Optional
[str
]) – The Amazon Resource Name (ARN) of the Amazon Simple Notification Service (SNS) topic to which notifications are sent. .. epigraph:: The Amazon SNS topic owner must be the same as the cluster owner.num_cache_clusters (
Union
[int
,float
,None
]) – The number of clusters this replication group initially has. This parameter is not used if there is more than one node group (shard). You should useReplicasPerNodeGroup
instead. IfAutomaticFailoverEnabled
istrue
, the value of this parameter must be at least 2. IfAutomaticFailoverEnabled
isfalse
you can omit this parameter (it will default to 1), or you can explicitly set it to a value between 2 and 6. The maximum permitted value forNumCacheClusters
is 6 (1 primary plus 5 replicas).num_node_groups (
Union
[int
,float
,None
]) –An optional parameter that specifies the number of node groups (shards) for this Redis (cluster mode enabled) replication group. For Redis (cluster mode disabled) either omit this parameter or set it to 1. If you set UseOnlineResharding to
true
, you can updateNumNodeGroups
without interruption. WhenUseOnlineResharding
is set tofalse
, or is not specified, updatingNumNodeGroups
results in replacement . Default: 1port (
Union
[int
,float
,None
]) – The port number on which each member of the replication group accepts connections.preferred_cache_cluster_a_zs (
Optional
[Sequence
[str
]]) – A list of EC2 Availability Zones in which the replication group’s clusters are created. The order of the Availability Zones in the list is the order in which clusters are allocated. The primary cluster is created in the first AZ in the list. This parameter is not used if there is more than one node group (shard). You should useNodeGroupConfiguration
instead. .. epigraph:: If you are creating your replication group in an Amazon VPC (recommended), you can only locate clusters in Availability Zones associated with the subnets in the selected subnet group. The number of Availability Zones listed must equal the value ofNumCacheClusters
. Default: system chosen Availability Zones.preferred_maintenance_window (
Optional
[str
]) – Specifies the weekly time range during which maintenance on the cluster is performed. It is specified as a range in the format ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period. Valid values forddd
are: -sun
-mon
-tue
-wed
-thu
-fri
-sat
Example:sun:23:00-mon:01:30
primary_cluster_id (
Optional
[str
]) – The identifier of the cluster that serves as the primary for this replication group. This cluster must already exist and have a status ofavailable
. This parameter is not required ifNumCacheClusters
,NumNodeGroups
, orReplicasPerNodeGroup
is specified.replicas_per_node_group (
Union
[int
,float
,None
]) – An optional parameter that specifies the number of replica nodes in each node group (shard). Valid values are 0 to 5.replication_group_id (
Optional
[str
]) – The replication group identifier. This parameter is stored as a lowercase string. Constraints: - A name must contain from 1 to 40 alphanumeric characters or hyphens. - The first character must be a letter. - A name cannot end with a hyphen or contain two consecutive hyphens.security_group_ids (
Optional
[Sequence
[str
]]) – One or more Amazon VPC security groups associated with this replication group. Use this parameter only when you are creating a replication group in an Amazon Virtual Private Cloud (Amazon VPC).snapshot_arns (
Optional
[Sequence
[str
]]) – A list of Amazon Resource Names (ARN) that uniquely identify the Redis RDB snapshot files stored in Amazon S3. The snapshot files are used to populate the new replication group. The Amazon S3 object name in the ARN cannot contain any commas. The new replication group will have the number of node groups (console: shards) specified by the parameter NumNodeGroups or the number of node groups configured by NodeGroupConfiguration regardless of the number of ARNs specified here. Example of an Amazon S3 ARN:arn:aws:s3:::my_bucket/snapshot1.rdb
snapshot_name (
Optional
[str
]) – The name of a snapshot from which to restore data into the new replication group. The snapshot status changes torestoring
while the new replication group is being created.snapshot_retention_limit (
Union
[int
,float
,None
]) – The number of days for which ElastiCache retains automatic snapshots before deleting them. For example, if you setSnapshotRetentionLimit
to 5, a snapshot that was taken today is retained for 5 days before being deleted. Default: 0 (i.e., automatic backups are disabled for this cluster).snapshotting_cluster_id (
Optional
[str
]) – The cluster ID that is used as the daily snapshot source for the replication group. This parameter cannot be set for Redis (cluster mode enabled) replication groups.snapshot_window (
Optional
[str
]) – The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of your node group (shard). Example:05:00-09:00
If you do not specify this parameter, ElastiCache automatically chooses an appropriate time range.tags (
Optional
[Sequence
[Union
[CfnTag
,Dict
[str
,Any
]]]]) – A list of tags to be added to this resource. Tags are comma-separated key,value pairs (e.g. Key=myKey
, Value=myKeyValue
. You can include multiple tags as shown following: Key=myKey
, Value=myKeyValue
Key=mySecondKey
, Value=mySecondKeyValue
. Tags on replication groups will be replicated to all nodes.transit_encryption_enabled (
Union
[bool
,IResolvable
,None
]) – A flag that enables in-transit encryption when set totrue
. You cannot modify the value ofTransitEncryptionEnabled
after the cluster is created. To enable in-transit encryption on a cluster you must setTransitEncryptionEnabled
totrue
when you create a cluster. This parameter is valid only if theEngine
parameter isredis
, theEngineVersion
parameter is3.2.6
or4.x
onward, and the cluster is being created in an Amazon VPC. If you enable in-transit encryption, you must also specify a value forCacheSubnetGroup
. Required: Only available when creating a replication group in an Amazon VPC using redis version3.2.6
or4.x
onward. Default:false
.. epigraph:: For HIPAA compliance, you must specifyTransitEncryptionEnabled
astrue
, anAuthToken
, and aCacheSubnetGroup
.transit_encryption_mode (
Optional
[str
]) – A setting that allows you to migrate your clients to use in-transit encryption, with no downtime. When settingTransitEncryptionEnabled
totrue
, you can set yourTransitEncryptionMode
topreferred
in the same request, to allow both encrypted and unencrypted connections at the same time. Once you migrate all your Redis clients to use encrypted connections you can modify the value torequired
to allow encrypted connections only. SettingTransitEncryptionMode
torequired
is a two-step process that requires you to first set theTransitEncryptionMode
topreferred
, after that you can setTransitEncryptionMode
torequired
. This process will not trigger the replacement of the replication group.user_group_ids (
Optional
[Sequence
[str
]]) – The ID of user group to associate with the replication group.
Methods
- add_deletion_override(path)
Syntactic sugar for
addOverride(path, undefined)
.- Parameters:
path (
str
) – The path of the value to delete.- Return type:
None
- add_depends_on(target)
Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.
This can be used for resources across stacks (or nested stack) boundaries and the dependency will automatically be transferred to the relevant scope.
- Parameters:
target (
CfnResource
)- Return type:
None
- add_metadata(key, value)
Add a value to the CloudFormation Resource Metadata.
- Parameters:
key (
str
)value (
Any
)
- See:
- Return type:
None
Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.
- add_override(path, value)
Adds an override to the synthesized CloudFormation resource.
To add a property override, either use
addPropertyOverride
or prefixpath
with “Properties.” (i.e.Properties.TopicName
).If the override is nested, separate each nested level using a dot (.) in the path parameter. If there is an array as part of the nesting, specify the index in the path.
To include a literal
.
in the property name, prefix with a\
. In most programming languages you will need to write this as"\\."
because the\
itself will need to be escaped.For example:
cfn_resource.add_override("Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes", ["myattribute"]) cfn_resource.add_override("Properties.GlobalSecondaryIndexes.1.ProjectionType", "INCLUDE")
would add the overrides Example:
"Properties": { "GlobalSecondaryIndexes": [ { "Projection": { "NonKeyAttributes": [ "myattribute" ] ... } ... }, { "ProjectionType": "INCLUDE" ... }, ] ... }
The
value
argument toaddOverride
will not be processed or translated in any way. Pass raw JSON values in here with the correct capitalization for CloudFormation. If you pass CDK classes or structs, they will be rendered with lowercased key names, and CloudFormation will reject the template.- Parameters:
path (
str
) –The path of the property, you can use dot notation to override values in complex types. Any intermdediate keys will be created as needed.
value (
Any
) –The value. Could be primitive or complex.
- Return type:
None
- add_property_deletion_override(property_path)
Adds an override that deletes the value of a property from the resource definition.
- Parameters:
property_path (
str
) – The path to the property.- Return type:
None
- add_property_override(property_path, value)
Adds an override to a resource property.
Syntactic sugar for
addOverride("Properties.<...>", value)
.- Parameters:
property_path (
str
) – The path of the property.value (
Any
) – The value.
- Return type:
None
- apply_removal_policy(policy=None, *, apply_to_update_replace_policy=None, default=None)
Sets the deletion policy of the resource based on the removal policy specified.
The Removal Policy controls what happens to this resource when it stops being managed by CloudFormation, either because you’ve removed it from the CDK application or because you’ve made a change that requires the resource to be replaced.
The resource can be deleted (
RemovalPolicy.DESTROY
), or left in your AWS account for data recovery and cleanup later (RemovalPolicy.RETAIN
).- Parameters:
policy (
Optional
[RemovalPolicy
])apply_to_update_replace_policy (
Optional
[bool
]) – Apply the same deletion policy to the resource’s “UpdateReplacePolicy”. Default: truedefault (
Optional
[RemovalPolicy
]) – The default policy to apply in case the removal policy is not defined. Default: - Default value is resource specific. To determine the default value for a resoure, please consult that specific resource’s documentation.
- Return type:
None
- get_att(attribute_name)
Returns a token for an runtime attribute of this resource.
Ideally, use generated attribute accessors (e.g.
resource.arn
), but this can be used for future compatibility in case there is no generated attribute.- Parameters:
attribute_name (
str
) – The name of the attribute.- Return type:
- get_metadata(key)
Retrieve a value value from the CloudFormation Resource Metadata.
- Parameters:
key (
str
)- See:
- Return type:
Any
Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.
- inspect(inspector)
Examines the CloudFormation resource and discloses attributes.
- Parameters:
inspector (
TreeInspector
) –tree inspector to collect and process attributes.
- Return type:
None
- override_logical_id(new_logical_id)
Overrides the auto-generated logical ID with a specific ID.
- Parameters:
new_logical_id (
str
) – The new logical ID to use for this stack element.- Return type:
None
- to_string()
Returns a string representation of this construct.
- Return type:
str
- Returns:
a string representation of this resource
Attributes
- CFN_RESOURCE_TYPE_NAME = 'AWS::ElastiCache::ReplicationGroup'
- at_rest_encryption_enabled
A flag that enables encryption at rest when set to
true
.You cannot modify the value of
AtRestEncryptionEnabled
after the replication group is created. To enable encryption at rest on a replication group you must setAtRestEncryptionEnabled
totrue
when you create the replication group.Required: Only available when creating a replication group in an Amazon VPC using redis version
3.2.6
or4.x
onward.Default:
false
- attr_configuration_end_point_address
The DNS hostname of the cache node.
Redis (cluster mode disabled) replication groups don’t have this attribute. Therefore,
Fn::GetAtt
returns a value for this attribute only if the replication group is clustered. Otherwise,Fn::GetAtt
fails. For Redis (cluster mode disabled) replication groups, use thePrimaryEndpoint
orReadEndpoint
attributes.- CloudformationAttribute:
ConfigurationEndPoint.Address
- attr_configuration_end_point_port
The port number that the cache engine is listening on.
- CloudformationAttribute:
ConfigurationEndPoint.Port
- attr_primary_end_point_address
The DNS address of the primary read-write cache node.
- CloudformationAttribute:
PrimaryEndPoint.Address
- attr_primary_end_point_port
The number of the port that the primary read-write cache engine is listening on.
- CloudformationAttribute:
PrimaryEndPoint.Port
- attr_read_end_point_addresses
A string with a list of endpoints for the primary and read-only replicas.
The order of the addresses maps to the order of the ports from the
ReadEndPoint.Ports
attribute.- CloudformationAttribute:
ReadEndPoint.Addresses
- attr_read_end_point_addresses_list
A string with a list of endpoints for the read-only replicas.
The order of the addresses maps to the order of the ports from the
ReadEndPoint.Ports
attribute.- CloudformationAttribute:
ReadEndPoint.Addresses.List
- attr_read_end_point_ports
A string with a list of ports for the read-only replicas.
The order of the ports maps to the order of the addresses from the
ReadEndPoint.Addresses
attribute.- CloudformationAttribute:
ReadEndPoint.Ports
- attr_read_end_point_ports_list
A string with a list of ports for the read-only replicas.
The order of the ports maps to the order of the addresses from the ReadEndPoint.Addresses attribute.
- CloudformationAttribute:
ReadEndPoint.Ports.List
- attr_reader_end_point_address
The address of the reader endpoint.
- CloudformationAttribute:
ReaderEndPoint.Address
- attr_reader_end_point_port
The port used by the reader endpoint.
- CloudformationAttribute:
ReaderEndPoint.Port
- auth_token
Reserved parameter. The password used to access a password protected server.
AuthToken
can be specified only on replication groups whereTransitEncryptionEnabled
istrue
. For more information, see Authenticating Users with the Redis AUTH Command . .. epigraph:For HIPAA compliance, you must specify ``TransitEncryptionEnabled`` as ``true`` , an ``AuthToken`` , and a ``CacheSubnetGroup`` .
Password constraints:
Must be only printable ASCII characters.
Must be at least 16 characters and no more than 128 characters in length.
Nonalphanumeric characters are restricted to (!, &, #, $, ^, <, >, -, ).
For more information, see AUTH password at http://redis.io/commands/AUTH. .. epigraph:
If ADDING the AuthToken, update requires `Replacement <https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement>`_ .
- auto_minor_version_upgrade
If you are running Redis engine version 6.0 or later, set this parameter to yes if you want to opt-in to the next minor version upgrade campaign. This parameter is disabled for previous versions.
- automatic_failover_enabled
Specifies whether a read-only replica is automatically promoted to read/write primary if the existing primary fails.
AutomaticFailoverEnabled
must be enabled for Redis (cluster mode enabled) replication groups.Default: false
- cache_node_type
The compute and memory capacity of the nodes in the node group (shard).
The following node types are supported by ElastiCache. Generally speaking, the current generation types provide more memory and computational power at lower cost when compared to their equivalent previous generation counterparts.
General purpose:
Current generation:
M6g node types:
cache.m6g.large
,cache.m6g.xlarge
,cache.m6g.2xlarge
,cache.m6g.4xlarge
,cache.m6g.12xlarge
,cache.m6g.24xlarge
M5 node types:
cache.m5.large
,cache.m5.xlarge
,cache.m5.2xlarge
,cache.m5.4xlarge
,cache.m5.12xlarge
,cache.m5.24xlarge
M4 node types:
cache.m4.large
,cache.m4.xlarge
,cache.m4.2xlarge
,cache.m4.4xlarge
,cache.m4.10xlarge
T4g node types:
cache.t4g.micro
,cache.t4g.small
,cache.t4g.medium
T3 node types:
cache.t3.micro
,cache.t3.small
,cache.t3.medium
T2 node types:
cache.t2.micro
,cache.t2.small
,cache.t2.medium
Previous generation: (not recommended)
T1 node types:
cache.t1.micro
M1 node types:
cache.m1.small
,cache.m1.medium
,cache.m1.large
,cache.m1.xlarge
M3 node types:
cache.m3.medium
,cache.m3.large
,cache.m3.xlarge
,cache.m3.2xlarge
Compute optimized:
Previous generation: (not recommended)
C1 node types:
cache.c1.xlarge
Memory optimized:
Current generation:
R6gd node types:
cache.r6gd.xlarge
,cache.r6gd.2xlarge
,cache.r6gd.4xlarge
,cache.r6gd.8xlarge
,cache.r6gd.12xlarge
,cache.r6gd.16xlarge
.. epigraph:The ``r6gd`` family is available in the following regions: ``us-east-2`` , ``us-east-1`` , ``us-west-2`` , ``us-west-1`` , ``eu-west-1`` , ``eu-central-1`` , ``ap-northeast-1`` , ``ap-southeast-1`` , ``ap-southeast-2`` .
R6g node types:
cache.r6g.large
,cache.r6g.xlarge
,cache.r6g.2xlarge
,cache.r6g.4xlarge
,cache.r6g.12xlarge
,cache.r6g.24xlarge
R5 node types:
cache.r5.large
,cache.r5.xlarge
,cache.r5.2xlarge
,cache.r5.4xlarge
,cache.r5.12xlarge
,cache.r5.24xlarge
R4 node types:
cache.r4.large
,cache.r4.xlarge
,cache.r4.2xlarge
,cache.r4.4xlarge
,cache.r4.8xlarge
,cache.r4.16xlarge
Previous generation: (not recommended)
M2 node types:
cache.m2.xlarge
,cache.m2.2xlarge
,cache.m2.4xlarge
R3 node types:
cache.r3.large
,cache.r3.xlarge
,cache.r3.2xlarge
,cache.r3.4xlarge
,cache.r3.8xlarge
For region availability, see Supported Node Types by Amazon Region
- cache_parameter_group_name
The name of the parameter group to associate with this replication group.
If this argument is omitted, the default cache parameter group for the specified engine is used.
If you are running Redis version 3.2.4 or later, only one node group (shard), and want to use a default parameter group, we recommend that you specify the parameter group by name.
To create a Redis (cluster mode disabled) replication group, use
CacheParameterGroupName=default.redis3.2
.To create a Redis (cluster mode enabled) replication group, use
CacheParameterGroupName=default.redis3.2.cluster.on
.
- cache_security_group_names
A list of cache security group names to associate with this replication group.
- cache_subnet_group_name
The name of the cache subnet group to be used for the replication group.
If you’re going to launch your cluster in an Amazon VPC, you need to create a subnet group before you start creating a cluster. For more information, see AWS::ElastiCache::SubnetGroup .
- cfn_options
Options for this resource, such as condition, update policy etc.
- cfn_resource_type
AWS resource type.
- cluster_mode
Enabled or Disabled.
To modify cluster mode from Disabled to Enabled, you must first set the cluster mode to Compatible. Compatible mode allows your Redis clients to connect using both cluster mode enabled and cluster mode disabled. After you migrate all Redis clients to use cluster mode enabled, you can then complete cluster mode configuration and set the cluster mode to Enabled. For more information, see Modify cluster mode .
- creation_stack
return:
the stack trace of the point where this Resource was created from, sourced from the +metadata+ entry typed +aws:cdk:logicalId+, and with the bottom-most node +internal+ entries filtered.
- data_tiering_enabled
Enables data tiering.
Data tiering is only supported for replication groups using the r6gd node type. This parameter must be set to true when using r6gd nodes. For more information, see Data tiering .
- engine
The name of the cache engine to be used for the clusters in this replication group.
The value must be set to
Redis
.
- engine_version
The version number of the cache engine to be used for the clusters in this replication group.
To view the supported cache engine versions, use the
DescribeCacheEngineVersions
operation.Important: You can upgrade to a newer engine version (see Selecting a Cache Engine and Version ) in the ElastiCache User Guide , but you cannot downgrade to an earlier engine version. If you want to use an earlier engine version, you must delete the existing cluster or replication group and create it anew with the earlier engine version.
- global_replication_group_id
The name of the Global datastore.
- ip_discovery
The network type you choose when creating a replication group, either
ipv4
|ipv6
.IPv6 is supported for workloads using Redis engine version 6.2 onward or Memcached engine version 1.6.6 on all instances built on the Nitro system .
- kms_key_id
The ID of the KMS key used to encrypt the disk on the cluster.
- log_delivery_configurations
Specifies the destination, format and type of the logs.
- logical_id
The logical ID for this CloudFormation stack element.
The logical ID of the element is calculated from the path of the resource node in the construct tree.
To override this value, use
overrideLogicalId(newLogicalId)
.- Returns:
the logical ID as a stringified token. This value will only get resolved during synthesis.
- multi_az_enabled
A flag indicating if you have Multi-AZ enabled to enhance fault tolerance.
For more information, see Minimizing Downtime: Multi-AZ .
- network_type
Must be either
ipv4
|ipv6
|dual_stack
.IPv6 is supported for workloads using Redis engine version 6.2 onward or Memcached engine version 1.6.6 on all instances built on the Nitro system .
- node
The construct tree node associated with this construct.
- node_group_configuration
NodeGroupConfiguration
is a property of theAWS::ElastiCache::ReplicationGroup
resource that configures an Amazon ElastiCache (ElastiCache) Redis cluster node group.If you set UseOnlineResharding to
true
, you can updateNodeGroupConfiguration
without interruption. WhenUseOnlineResharding
is set tofalse
, or is not specified, updatingNodeGroupConfiguration
results in replacement .
- notification_topic_arn
The Amazon Resource Name (ARN) of the Amazon Simple Notification Service (SNS) topic to which notifications are sent.
The Amazon SNS topic owner must be the same as the cluster owner.
- num_cache_clusters
The number of clusters this replication group initially has.
This parameter is not used if there is more than one node group (shard). You should use
ReplicasPerNodeGroup
instead.If
AutomaticFailoverEnabled
istrue
, the value of this parameter must be at least 2. IfAutomaticFailoverEnabled
isfalse
you can omit this parameter (it will default to 1), or you can explicitly set it to a value between 2 and 6.The maximum permitted value for
NumCacheClusters
is 6 (1 primary plus 5 replicas).
- num_node_groups
An optional parameter that specifies the number of node groups (shards) for this Redis (cluster mode enabled) replication group.
For Redis (cluster mode disabled) either omit this parameter or set it to 1.
If you set UseOnlineResharding to
true
, you can updateNumNodeGroups
without interruption. WhenUseOnlineResharding
is set tofalse
, or is not specified, updatingNumNodeGroups
results in replacement .Default: 1
- port
The port number on which each member of the replication group accepts connections.
- preferred_cache_cluster_a_zs
A list of EC2 Availability Zones in which the replication group’s clusters are created.
The order of the Availability Zones in the list is the order in which clusters are allocated. The primary cluster is created in the first AZ in the list.
This parameter is not used if there is more than one node group (shard). You should use
NodeGroupConfiguration
instead. .. epigraph:If you are creating your replication group in an Amazon VPC (recommended), you can only locate clusters in Availability Zones associated with the subnets in the selected subnet group. The number of Availability Zones listed must equal the value of ``NumCacheClusters`` .
Default: system chosen Availability Zones.
- preferred_maintenance_window
Specifies the weekly time range during which maintenance on the cluster is performed.
It is specified as a range in the format ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC). The minimum maintenance window is a 60 minute period.
Valid values for
ddd
are:sun
mon
tue
wed
thu
fri
sat
Example:
sun:23:00-mon:01:30
- primary_cluster_id
The identifier of the cluster that serves as the primary for this replication group.
This cluster must already exist and have a status of
available
.This parameter is not required if
NumCacheClusters
,NumNodeGroups
, orReplicasPerNodeGroup
is specified.
- ref
Return a string that will be resolved to a CloudFormation
{ Ref }
for this element.If, by any chance, the intrinsic reference of a resource is not a string, you could coerce it to an IResolvable through
Lazy.any({ produce: resource.ref })
.
- replicas_per_node_group
An optional parameter that specifies the number of replica nodes in each node group (shard).
Valid values are 0 to 5.
- replication_group_description
A user-created description for the replication group.
- replication_group_id
The replication group identifier. This parameter is stored as a lowercase string.
Constraints:
A name must contain from 1 to 40 alphanumeric characters or hyphens.
The first character must be a letter.
A name cannot end with a hyphen or contain two consecutive hyphens.
- security_group_ids
One or more Amazon VPC security groups associated with this replication group.
Use this parameter only when you are creating a replication group in an Amazon Virtual Private Cloud (Amazon VPC).
- snapshot_arns
A list of Amazon Resource Names (ARN) that uniquely identify the Redis RDB snapshot files stored in Amazon S3.
The snapshot files are used to populate the new replication group. The Amazon S3 object name in the ARN cannot contain any commas. The new replication group will have the number of node groups (console: shards) specified by the parameter NumNodeGroups or the number of node groups configured by NodeGroupConfiguration regardless of the number of ARNs specified here.
Example of an Amazon S3 ARN:
arn:aws:s3:::my_bucket/snapshot1.rdb
- snapshot_name
The name of a snapshot from which to restore data into the new replication group.
The snapshot status changes to
restoring
while the new replication group is being created.
- snapshot_retention_limit
The number of days for which ElastiCache retains automatic snapshots before deleting them.
For example, if you set
SnapshotRetentionLimit
to 5, a snapshot that was taken today is retained for 5 days before being deleted.Default: 0 (i.e., automatic backups are disabled for this cluster).
- snapshot_window
The daily time range (in UTC) during which ElastiCache begins taking a daily snapshot of your node group (shard).
Example:
05:00-09:00
If you do not specify this parameter, ElastiCache automatically chooses an appropriate time range.
- snapshotting_cluster_id
The cluster ID that is used as the daily snapshot source for the replication group.
This parameter cannot be set for Redis (cluster mode enabled) replication groups.
- stack
The stack in which this element is defined.
CfnElements must be defined within a stack scope (directly or indirectly).
- tags
A list of tags to be added to this resource.
Tags are comma-separated key,value pairs (e.g. Key=
myKey
, Value=myKeyValue
. You can include multiple tags as shown following: Key=myKey
, Value=myKeyValue
Key=mySecondKey
, Value=mySecondKeyValue
. Tags on replication groups will be replicated to all nodes.
- transit_encryption_enabled
A flag that enables in-transit encryption when set to
true
.You cannot modify the value of
TransitEncryptionEnabled
after the cluster is created. To enable in-transit encryption on a cluster you must setTransitEncryptionEnabled
totrue
when you create a cluster.This parameter is valid only if the
Engine
parameter isredis
, theEngineVersion
parameter is3.2.6
or4.x
onward, and the cluster is being created in an Amazon VPC.If you enable in-transit encryption, you must also specify a value for
CacheSubnetGroup
.Required: Only available when creating a replication group in an Amazon VPC using redis version
3.2.6
or4.x
onward.Default:
false
.. epigraph:For HIPAA compliance, you must specify ``TransitEncryptionEnabled`` as ``true`` , an ``AuthToken`` , and a ``CacheSubnetGroup`` .
- transit_encryption_mode
A setting that allows you to migrate your clients to use in-transit encryption, with no downtime.
When setting
TransitEncryptionEnabled
totrue
, you can set yourTransitEncryptionMode
topreferred
in the same request, to allow both encrypted and unencrypted connections at the same time. Once you migrate all your Redis clients to use encrypted connections you can modify the value torequired
to allow encrypted connections only.Setting
TransitEncryptionMode
torequired
is a two-step process that requires you to first set theTransitEncryptionMode
topreferred
, after that you can setTransitEncryptionMode
torequired
.This process will not trigger the replacement of the replication group.
- user_group_ids
The ID of user group to associate with the replication group.
Static Methods
- classmethod is_cfn_element(x)
Returns
true
if a construct is a stack element (i.e. part of the synthesized cloudformation template).Uses duck-typing instead of
instanceof
to allow stack elements from different versions of this library to be included in the same stack.- Parameters:
x (
Any
)- Return type:
bool
- Returns:
The construct as a stack element or undefined if it is not a stack element.
- classmethod is_cfn_resource(construct)
Check whether the given construct is a CfnResource.
- Parameters:
construct (
IConstruct
)- Return type:
bool
- classmethod is_construct(x)
Return whether the given object is a Construct.
- Parameters:
x (
Any
)- Return type:
bool
CloudWatchLogsDestinationDetailsProperty
- class CfnReplicationGroup.CloudWatchLogsDestinationDetailsProperty(*, log_group)
Bases:
object
The configuration details of the CloudWatch Logs destination.
Note that this field is marked as required but only if CloudWatch Logs was chosen as the destination.
- Parameters:
log_group (
str
) – The name of the CloudWatch Logs log group.- Link:
- ExampleMetadata:
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_elasticache as elasticache cloud_watch_logs_destination_details_property = elasticache.CfnReplicationGroup.CloudWatchLogsDestinationDetailsProperty( log_group="logGroup" )
Attributes
- log_group
The name of the CloudWatch Logs log group.
DestinationDetailsProperty
- class CfnReplicationGroup.DestinationDetailsProperty(*, cloud_watch_logs_details=None, kinesis_firehose_details=None)
Bases:
object
Configuration details of either a CloudWatch Logs destination or Kinesis Data Firehose destination.
- Parameters:
cloud_watch_logs_details (
Union
[IResolvable
,CloudWatchLogsDestinationDetailsProperty
,Dict
[str
,Any
],None
]) – The configuration details of the CloudWatch Logs destination. Note that this field is marked as required but only if CloudWatch Logs was chosen as the destination.kinesis_firehose_details (
Union
[IResolvable
,KinesisFirehoseDestinationDetailsProperty
,Dict
[str
,Any
],None
]) – The configuration details of the Kinesis Data Firehose destination. Note that this field is marked as required but only if Kinesis Data Firehose was chosen as the destination.
- Link:
- ExampleMetadata:
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_elasticache as elasticache destination_details_property = elasticache.CfnReplicationGroup.DestinationDetailsProperty( cloud_watch_logs_details=elasticache.CfnReplicationGroup.CloudWatchLogsDestinationDetailsProperty( log_group="logGroup" ), kinesis_firehose_details=elasticache.CfnReplicationGroup.KinesisFirehoseDestinationDetailsProperty( delivery_stream="deliveryStream" ) )
Attributes
- cloud_watch_logs_details
The configuration details of the CloudWatch Logs destination.
Note that this field is marked as required but only if CloudWatch Logs was chosen as the destination.
- kinesis_firehose_details
The configuration details of the Kinesis Data Firehose destination.
Note that this field is marked as required but only if Kinesis Data Firehose was chosen as the destination.
KinesisFirehoseDestinationDetailsProperty
- class CfnReplicationGroup.KinesisFirehoseDestinationDetailsProperty(*, delivery_stream)
Bases:
object
The configuration details of the Kinesis Data Firehose destination.
Note that this field is marked as required but only if Kinesis Data Firehose was chosen as the destination.
- Parameters:
delivery_stream (
str
) – The name of the Kinesis Data Firehose delivery stream.- Link:
- ExampleMetadata:
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_elasticache as elasticache kinesis_firehose_destination_details_property = elasticache.CfnReplicationGroup.KinesisFirehoseDestinationDetailsProperty( delivery_stream="deliveryStream" )
Attributes
- delivery_stream
The name of the Kinesis Data Firehose delivery stream.
LogDeliveryConfigurationRequestProperty
- class CfnReplicationGroup.LogDeliveryConfigurationRequestProperty(*, destination_details, destination_type, log_format, log_type)
Bases:
object
Specifies the destination, format and type of the logs.
- Parameters:
destination_details (
Union
[IResolvable
,DestinationDetailsProperty
,Dict
[str
,Any
]]) – Configuration details of either a CloudWatch Logs destination or Kinesis Data Firehose destination.destination_type (
str
) – Specify either CloudWatch Logs or Kinesis Data Firehose as the destination type. Valid values are eithercloudwatch-logs
orkinesis-firehose
.log_format (
str
) – Valid values are eitherjson
ortext
.log_type (
str
) – Valid value is eitherslow-log
, which refers to slow-log orengine-log
.
- Link:
- ExampleMetadata:
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_elasticache as elasticache log_delivery_configuration_request_property = elasticache.CfnReplicationGroup.LogDeliveryConfigurationRequestProperty( destination_details=elasticache.CfnReplicationGroup.DestinationDetailsProperty( cloud_watch_logs_details=elasticache.CfnReplicationGroup.CloudWatchLogsDestinationDetailsProperty( log_group="logGroup" ), kinesis_firehose_details=elasticache.CfnReplicationGroup.KinesisFirehoseDestinationDetailsProperty( delivery_stream="deliveryStream" ) ), destination_type="destinationType", log_format="logFormat", log_type="logType" )
Attributes
- destination_details
Configuration details of either a CloudWatch Logs destination or Kinesis Data Firehose destination.
- destination_type
Specify either CloudWatch Logs or Kinesis Data Firehose as the destination type.
Valid values are either
cloudwatch-logs
orkinesis-firehose
.
- log_format
Valid values are either
json
ortext
.
NodeGroupConfigurationProperty
- class CfnReplicationGroup.NodeGroupConfigurationProperty(*, node_group_id=None, primary_availability_zone=None, replica_availability_zones=None, replica_count=None, slots=None)
Bases:
object
NodeGroupConfiguration
is a property of theAWS::ElastiCache::ReplicationGroup
resource that configures an Amazon ElastiCache (ElastiCache) Redis cluster node group.- Parameters:
node_group_id (
Optional
[str
]) – Either the ElastiCache for Redis supplied 4-digit id or a user supplied id for the node group these configuration values apply to.primary_availability_zone (
Optional
[str
]) – The Availability Zone where the primary node of this node group (shard) is launched.replica_availability_zones (
Optional
[Sequence
[str
]]) – A list of Availability Zones to be used for the read replicas. The number of Availability Zones in this list must match the value ofReplicaCount
orReplicasPerNodeGroup
if not specified.replica_count (
Union
[int
,float
,None
]) – The number of read replica nodes in this node group (shard).slots (
Optional
[str
]) – A string of comma-separated values where the first set of values are the slot numbers (zero based), and the second set of values are the keyspaces for each slot. The following example specifies three slots (numbered 0, 1, and 2):0,1,2,0-4999,5000-9999,10000-16,383
. If you don’t specify a value, ElastiCache allocates keys equally among each slot. When you use anUseOnlineResharding
update policy to update the number of node groups without interruption, ElastiCache evenly distributes the keyspaces between the specified number of slots. This cannot be updated later. Therefore, after updating the number of node groups in this way, you should remove the value specified for theSlots
property of eachNodeGroupConfiguration
from the stack template, as it no longer reflects the actual values in each node group. For more information, see UseOnlineResharding Policy .
- Link:
- ExampleMetadata:
fixture=_generated
Example:
# The code below shows an example of how to instantiate this type. # The values are placeholders you should change. import aws_cdk.aws_elasticache as elasticache node_group_configuration_property = elasticache.CfnReplicationGroup.NodeGroupConfigurationProperty( node_group_id="nodeGroupId", primary_availability_zone="primaryAvailabilityZone", replica_availability_zones=["replicaAvailabilityZones"], replica_count=123, slots="slots" )
Attributes
- node_group_id
Either the ElastiCache for Redis supplied 4-digit id or a user supplied id for the node group these configuration values apply to.
- primary_availability_zone
The Availability Zone where the primary node of this node group (shard) is launched.
- replica_availability_zones
A list of Availability Zones to be used for the read replicas.
The number of Availability Zones in this list must match the value of
ReplicaCount
orReplicasPerNodeGroup
if not specified.
- replica_count
The number of read replica nodes in this node group (shard).
- slots
A string of comma-separated values where the first set of values are the slot numbers (zero based), and the second set of values are the keyspaces for each slot.
The following example specifies three slots (numbered 0, 1, and 2):
0,1,2,0-4999,5000-9999,10000-16,383
.If you don’t specify a value, ElastiCache allocates keys equally among each slot.
When you use an
UseOnlineResharding
update policy to update the number of node groups without interruption, ElastiCache evenly distributes the keyspaces between the specified number of slots. This cannot be updated later. Therefore, after updating the number of node groups in this way, you should remove the value specified for theSlots
property of eachNodeGroupConfiguration
from the stack template, as it no longer reflects the actual values in each node group. For more information, see UseOnlineResharding Policy .