NAME

Paws::EMR::CloudWatchAlarmDefinition

USAGE

This class represents one of two things:

Arguments in a call to a service

Use the attributes of this class as arguments to methods. You shouldn't make instances of this class. Each attribute should be used as a named argument in the calls that expect this type of object.

As an example, if Att1 is expected to be a Paws::EMR::CloudWatchAlarmDefinition object:

  $service_obj->Method(Att1 => { ComparisonOperator => $value, ..., Unit => $value  });

Results returned from an API call

Use accessors for each attribute. If Att1 is expected to be an Paws::EMR::CloudWatchAlarmDefinition object:

  $result = $service_obj->Method(...);
  $result->Att1->ComparisonOperator

DESCRIPTION

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.

ATTRIBUTES

REQUIRED ComparisonOperator => Str

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

Dimensions => ArrayRef[Paws::EMR::MetricDimension]

  A CloudWatch metric dimension.

EvaluationPeriods => Int

  The number of periods, expressed in seconds using C<Period>, during
which the alarm condition must exist before the alarm triggers
automatic scaling activity. The default value is C<1>.

REQUIRED MetricName => Str

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

Namespace => Str

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

REQUIRED Period => Int

  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 C<300>.

Statistic => Str

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

REQUIRED Threshold => Num

  The value against which the specified statistic is compared.

Unit => Str

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

SEE ALSO

This class forms part of Paws, describing an object used in Paws::EMR

BUGS and CONTRIBUTIONS

The source code is located here: https://github.com/pplu/aws-sdk-perl

Please report bugs to: https://github.com/pplu/aws-sdk-perl/issues

cpanm Paws::SDK::Config

perl -MCPAN -e shell
install Paws::SDK::Config