Configuration defining a new instance group.
Contents
- InstanceCount
-
Target number of instances for the instance group.
Type: Integer
Required: Yes
- InstanceRole
-
The role of the instance group in the cluster.
Type: String
Valid Values:
MASTER | CORE | TASKRequired: Yes
- InstanceType
-
The Amazon EC2 instance type for all instances in the instance group.
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
- AutoScalingPolicy
-
An automatic scaling policy for a core instance group or task instance group in an Amazon EMR cluster. The automatic scaling policy defines how an instance group dynamically adds and terminates Amazon EC2 instances in response to the value of a CloudWatch metric. See PutAutoScalingPolicy.
Type: AutoScalingPolicy object
Required: No
- BidPrice
-
If specified, indicates that the instance group uses Spot Instances. This is the maximum price you are willing to pay for Spot Instances. Specify
OnDemandPriceto set the amount equal to the On-Demand price, or specify an amount in USD.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
- Configurations
-
Note
Amazon EMR releases 4.x or later.
The list of configurations supplied for an Amazon EMR cluster instance group. You can specify a separate configuration for each instance group (master, core, and task).
Type: Array of Configuration objects
Required: No
- CustomAmiId
-
The custom AMI ID to use for the provisioned 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
- EbsConfiguration
-
EBS configurations that will be attached to each Amazon EC2 instance in the instance group.
Type: EbsConfiguration object
Required: No
- Market
-
Market type of the Amazon EC2 instances used to create a cluster node.
Type: String
Valid Values:
ON_DEMAND | SPOTRequired: No
- Name
-
Friendly name given to 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
See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
