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Amazon Elastic MapReduce
API Reference (API Version 2009-03-31)

InstanceGroupDetail

Detailed information about an instance group.

Contents

BidPrice

The maximum Spot price your are willing to pay for EC2 instances.

If BidPrice is specified, Amazon EMR uses Spot Instances for the instance group. Specified in USD. Alternatively, a value of OnDemandPrice indicates that the maximum Spot price is set equal to the On-Demand price.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 256.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

CreationDateTime

The date/time the instance group was created.

Type: Timestamp

Required: Yes

EndDateTime

The date/time the instance group was terminated.

Type: Timestamp

Required: No

InstanceGroupId

Unique identifier for the instance group.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 256.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

InstanceRequestCount

Target number of instances to run in the instance group.

Type: Integer

Required: Yes

InstanceRole

Instance group role in the cluster

Type: String

Valid Values: MASTER | CORE | TASK

Required: Yes

InstanceRunningCount

Actual count of running instances.

Type: Integer

Required: Yes

InstanceType

EC2 instance type.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: Yes

LastStateChangeReason

Details regarding the state of the instance group.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 10280.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

Market

Market type of the EC2 instances used to create a cluster node.

Type: String

Valid Values: ON_DEMAND | SPOT

Required: Yes

Name

Friendly name for the instance group.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 256.

Pattern: [\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*

Required: No

ReadyDateTime

The date/time the instance group was available to the cluster.

Type: Timestamp

Required: No

StartDateTime

The date/time the instance group was started.

Type: Timestamp

Required: No

State

State of instance group. The following values are deprecated: STARTING, TERMINATED, and FAILED.

Type: String

Valid Values: PROVISIONING | BOOTSTRAPPING | RUNNING | RESIZING | SUSPENDED | TERMINATING | TERMINATED | ARRESTED | SHUTTING_DOWN | ENDED

Required: Yes

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following:

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