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Showing content from https://docs.aws.amazon.com/sdkforruby/api/Aws/EMR/Types/CloudWatchAlarmDefinition.html below:

CloudWatchAlarmDefinition — AWS SDK for Ruby V2

You are viewing documentation for version 2 of the AWS SDK for Ruby. Version 3 documentation can be found here.

Inherits:

Struct

• Object
• Struct
• Aws::EMR::Types::CloudWatchAlarmDefinition

show all

Defined in:

(unknown)

When passing CloudWatchAlarmDefinition as input to an Aws::Client method, you can use a vanilla Hash:

{
  comparison_operator: "GREATER_THAN_OR_EQUAL",   evaluation_periods: 1,
  metric_name: "String",   namespace: "String",
  period: 1,   statistic: "SAMPLE_COUNT",   threshold: 1.0,   unit: "NONE",   dimensions: [
    {
      key: "String",
      value: "String",
    },
  ],
}

The definition of a CloudWatch metric alarm, which determines when an automatic scaling activity is triggered. When the defined alarm conditions are satisfied, scaling activity begins.

Returned by:

• ScalingTrigger#cloud_watch_alarm_definition

• #comparison_operator ⇒ String

  Determines how the metric specified by MetricName is compared to the value specified by Threshold.

• #dimensions ⇒ Array<Types::MetricDimension>

  A CloudWatch metric dimension.

• #evaluation_periods ⇒ Integer

  The number of periods, in five-minute increments, during which the alarm condition must exist before the alarm triggers automatic scaling activity.

• #metric_name ⇒ String

  The name of the CloudWatch metric that is watched to determine an alarm condition.

• #namespace ⇒ String

  The namespace for the CloudWatch metric.

• #period ⇒ Integer

  The period, in seconds, over which the statistic is applied.

• #statistic ⇒ String

  The statistic to apply to the metric associated with the alarm.

• #threshold ⇒ Float

  The value against which the specified statistic is compared.

• #unit ⇒ String

  The unit of measure associated with the CloudWatch metric being watched.

Determines how the metric specified by MetricName is compared to the value specified by Threshold.

Possible values:

• GREATER_THAN_OR_EQUAL
• GREATER_THAN
• LESS_THAN
• LESS_THAN_OR_EQUAL

The number of periods, in five-minute increments, during which the alarm condition must exist before the alarm triggers automatic scaling activity. The default value is 1.

The name of the CloudWatch metric that is watched to determine an alarm condition.

The namespace for the CloudWatch metric. The default is AWS/ElasticMapReduce.

The period, in seconds, over which the statistic is applied. EMR CloudWatch metrics are emitted every five minutes (300 seconds), so if an EMR CloudWatch metric is specified, specify 300.

The statistic to apply to the metric associated with the alarm. The default is AVERAGE.

Possible values:

• SAMPLE_COUNT
• AVERAGE
• SUM
• MINIMUM
• MAXIMUM

The value against which the specified statistic is compared.

The unit of measure associated with the CloudWatch metric being watched. The value specified for Unit must correspond to the units specified in the CloudWatch metric.

Possible values:

• NONE
• SECONDS
• MICRO_SECONDS
• MILLI_SECONDS
• BYTES
• KILO_BYTES
• MEGA_BYTES
• GIGA_BYTES
• TERA_BYTES
• BITS
• KILO_BITS
• MEGA_BITS
• GIGA_BITS
• TERA_BITS
• PERCENT
• COUNT
• BYTES_PER_SECOND
• KILO_BYTES_PER_SECOND
• MEGA_BYTES_PER_SECOND
• GIGA_BYTES_PER_SECOND
• TERA_BYTES_PER_SECOND
• BITS_PER_SECOND
• KILO_BITS_PER_SECOND
• MEGA_BITS_PER_SECOND
• GIGA_BITS_PER_SECOND
• TERA_BITS_PER_SECOND
• COUNT_PER_SECOND

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