AWS::Cassandra::Table TargetTrackingScalingPolicyConfiguration

Amazon Keyspaces supports the target tracking auto scaling policy for a provisioned table. This policy scales a table based on the ratio of consumed to provisioned capacity. The auto scaling target is a percentage of the provisioned capacity of the table.

• targetTrackingScalingPolicyConfiguration: To define the target tracking policy, you must define the target value.

  • targetValue: The target utilization rate of the table. Amazon Keyspaces auto scaling ensures that the ratio of consumed capacity to provisioned capacity stays at or near this value. You define targetValue as a percentage. A double between 20 and 90. (Required)

  • disableScaleIn: A boolean that specifies if scale-in is disabled or enabled for the table. This parameter is disabled by default. To turn on scale-in, set the boolean value to FALSE. This means that capacity for a table can be automatically scaled down on your behalf. (Optional)

  • scaleInCooldown: A cooldown period in seconds between scaling activities that lets the table stabilize before another scale in activity starts. If no value is provided, the default is 0. (Optional)

  • scaleOutCooldown: A cooldown period in seconds between scaling activities that lets the table stabilize before another scale out activity starts. If no value is provided, the default is 0. (Optional)

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON

{
  "DisableScaleIn" : Boolean,
  "ScaleInCooldown" : Integer,
  "ScaleOutCooldown" : Integer,
  "TargetValue" : Integer
}

YAML

  DisableScaleIn: Boolean
  ScaleInCooldown: Integer
  ScaleOutCooldown: Integer
  TargetValue: Integer

Properties

DisableScaleIn

Specifies if scale-in is enabled.

When auto scaling automatically decreases capacity for a table, the table scales in. When scaling policies are set, they can't scale in the table lower than its minimum capacity.

Required: No

Type: Boolean

Update requires: No interruption

ScaleInCooldown

Specifies a scale-in cool down period.

A cooldown period in seconds between scaling activities that lets the table stabilize before another scaling activity starts.

Required: No

Type: Integer

Update requires: No interruption

ScaleOutCooldown

Specifies a scale out cool down period.

A cooldown period in seconds between scaling activities that lets the table stabilize before another scaling activity starts.

Required: No

Type: Integer

Update requires: No interruption

TargetValue

Specifies the target value for the target tracking auto scaling policy.

Amazon Keyspaces auto scaling scales up capacity automatically when traffic exceeds this target utilization rate, and then back down when it falls below the target. This ensures that the ratio of consumed capacity to provisioned capacity stays at or near this value. You define targetValue as a percentage. An integer between 20 and 90.

Required: Yes

Type: Integer

Update requires: No interruption