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# 在 Amazon Keyspaces 中查看多区域表的预置容量和自动扩缩设置
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您可以使用 Amazon Keyspaces 控制台、CQL 或 AWS CLI查看多区域表的预置容量和自动扩缩设置。本节提供了如何使用 CQL 和执行此操作的 AWS CLI示例。

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#### [ Cassandra Query Language (CQL) ]

**使用 CQL 查看多区域表的预置容量和自动扩缩设置**
+ 要查看多区域表的自动扩缩配置，请使用以下命令。

  ```
  SELECT * FROM system_multiregion_info.autoscaling WHERE keyspace_name = 'mykeyspace' AND table_name = 'mytable';
  ```

  此命令的输出如下所示：

  ```
   keyspace_name  | table_name | region         | provisioned_read_capacity_autoscaling_update                                                                                                                                                                      | provisioned_write_capacity_autoscaling_update
  ----------------+------------+----------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
    mykeyspace    |  mytable   | ap-southeast-1 | {'minimum_units': 5, 'maximum_units': 10, 'scaling_policy': {'target_tracking_scaling_policy_configuration': {'scale_out_cooldown': 60, 'disable_scale_in': false, 'target_value': 50, 'scale_in_cooldown': 60}}} | {'minimum_units': 5, 'maximum_units': 10, 'scaling_policy': {'target_tracking_scaling_policy_configuration': {'scale_out_cooldown': 0, 'disable_scale_in': false, 'target_value': 50, 'scale_in_cooldown': 0}}}
    mykeyspace    |  mytable   | us-east-1      | {'minimum_units': 5, 'maximum_units': 20, 'scaling_policy': {'target_tracking_scaling_policy_configuration': {'scale_out_cooldown': 60, 'disable_scale_in': false, 'target_value': 70, 'scale_in_cooldown': 60}}} | {'minimum_units': 5, 'maximum_units': 10, 'scaling_policy': {'target_tracking_scaling_policy_configuration': {'scale_out_cooldown': 0, 'disable_scale_in': false, 'target_value': 50, 'scale_in_cooldown': 0}}}
    mykeyspace    |  mytable   | eu-west-1      | {'minimum_units': 5, 'maximum_units': 10, 'scaling_policy': {'target_tracking_scaling_policy_configuration': {'scale_out_cooldown': 60, 'disable_scale_in': false, 'target_value': 50, 'scale_in_cooldown': 60}}} | {'minimum_units': 5, 'maximum_units': 10, 'scaling_policy': {'target_tracking_scaling_policy_configuration': {'scale_out_cooldown': 0, 'disable_scale_in': false, 'target_value': 50, 'scale_in_cooldown': 0}}}
  ```

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#### [ CLI ]

**使用查看多区域表的预配置容量和 auto scaling 设置 AWS CLI**
+ 要查看多区域表的自动扩缩配置，您可以使用 `get-table-auto-scaling-settings` 操作。下面是一个 CLI 命令示例。

  ```
  aws keyspaces get-table-auto-scaling-settings --keyspace-name mykeyspace --table-name mytable
  ```

  您应当看到如下输出。

  ```
  {
      "keyspaceName": "mykeyspace",
      "tableName": "mytable",
      "resourceArn": "arn:aws:cassandra:us-east-1:777788889999:/keyspace/mykeyspace/table/mytable",
      "autoScalingSpecification": {
          "writeCapacityAutoScaling": {
              "autoScalingDisabled": false,
              "minimumUnits": 5,
              "maximumUnits": 10,
              "scalingPolicy": {
                  "targetTrackingScalingPolicyConfiguration": {
                      "disableScaleIn": false,
                      "scaleInCooldown": 0,
                      "scaleOutCooldown": 0,
                      "targetValue": 50.0
                  }
              }
          },
          "readCapacityAutoScaling": {
              "autoScalingDisabled": false,
              "minimumUnits": 5,
              "maximumUnits": 20,
              "scalingPolicy": {
                  "targetTrackingScalingPolicyConfiguration": {
                      "disableScaleIn": false,
                      "scaleInCooldown": 60,
                      "scaleOutCooldown": 60,
                      "targetValue": 70.0
                  }
              }
          }
      },
      "replicaSpecifications": [
          {
              "region": "us-east-1",
              "autoScalingSpecification": {
                  "writeCapacityAutoScaling": {
                      "autoScalingDisabled": false,
                      "minimumUnits": 5,
                      "maximumUnits": 10,
                      "scalingPolicy": {
                          "targetTrackingScalingPolicyConfiguration": {
                              "disableScaleIn": false,
                              "scaleInCooldown": 0,
                              "scaleOutCooldown": 0,
                              "targetValue": 50.0
                          }
                      }
                  },
                  "readCapacityAutoScaling": {
                      "autoScalingDisabled": false,
                      "minimumUnits": 5,
                      "maximumUnits": 20,
                      "scalingPolicy": {
                          "targetTrackingScalingPolicyConfiguration": {
                              "disableScaleIn": false,
                              "scaleInCooldown": 60,
                              "scaleOutCooldown": 60,
                              "targetValue": 70.0
                          }
                      }
                  }
              }
          },
          {
              "region": "eu-north-1",
              "autoScalingSpecification": {
                  "writeCapacityAutoScaling": {
                      "autoScalingDisabled": false,
                      "minimumUnits": 5,
                      "maximumUnits": 10,
                      "scalingPolicy": {
                          "targetTrackingScalingPolicyConfiguration": {
                              "disableScaleIn": false,
                              "scaleInCooldown": 0,
                              "scaleOutCooldown": 0,
                              "targetValue": 50.0
                          }
                      }
                  },
                  "readCapacityAutoScaling": {
                      "autoScalingDisabled": false,
                      "minimumUnits": 5,
                      "maximumUnits": 10,
                      "scalingPolicy": {
                          "targetTrackingScalingPolicyConfiguration": {
                              "disableScaleIn": false,
                              "scaleInCooldown": 60,
                              "scaleOutCooldown": 60,
                              "targetValue": 50.0
                          }
                      }
                  }
              }
          }
      ]
  }
  ```

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