InstanceGroup class
This entity represents an instance group, which is a group of instances that have common purpose. For example, CORE instance group is used for HDFS.
Constructors
-
InstanceGroup({AutoScalingPolicyDescription? autoScalingPolicy, String? bidPrice, List<
Configuration> ? configurations, int? configurationsVersion, List<EbsBlockDevice> ? ebsBlockDevices, bool? ebsOptimized, String? id, InstanceGroupType? instanceGroupType, String? instanceType, List<Configuration> ? lastSuccessfullyAppliedConfigurations, int? lastSuccessfullyAppliedConfigurationsVersion, MarketType? market, String? name, int? requestedInstanceCount, int? runningInstanceCount, ShrinkPolicy? shrinkPolicy, InstanceGroupStatus? status}) -
InstanceGroup.fromJson(Map<
String, dynamic> json) -
factory
Properties
- autoScalingPolicy → AutoScalingPolicyDescription?
-
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 EC2 instances in response to
the value of a CloudWatch metric. See PutAutoScalingPolicy.
final
- bidPrice → String?
-
The bid price for each EC2 Spot Instance type as defined by
InstanceType. Expressed in USD. If neitherBidPricenorBidPriceAsPercentageOfOnDemandPriceis provided,BidPriceAsPercentageOfOnDemandPricedefaults to 100%.final -
configurations
→ List<
Configuration> ? -
final
- configurationsVersion → int?
-
The version number of the requested configuration specification for this
instance group.
final
-
ebsBlockDevices
→ List<
EbsBlockDevice> ? -
The EBS block devices that are mapped to this instance group.
final
- ebsOptimized → bool?
-
If the instance group is EBS-optimized. An Amazon EBS-optimized instance
uses an optimized configuration stack and provides additional, dedicated
capacity for Amazon EBS I/O.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- id → String?
-
The identifier of the instance group.
final
- instanceGroupType → InstanceGroupType?
-
The type of the instance group. Valid values are MASTER, CORE or TASK.
final
- instanceType → String?
-
The EC2 instance type for all instances in the instance group.
final
-
lastSuccessfullyAppliedConfigurations
→ List<
Configuration> ? -
A list of configurations that were successfully applied for an instance
group last time.
final
- lastSuccessfullyAppliedConfigurationsVersion → int?
-
The version number of a configuration specification that was successfully
applied for an instance group last time.
final
- market → MarketType?
-
The marketplace to provision instances for this group. Valid values are
ON_DEMAND or SPOT.
final
- name → String?
-
The name of the instance group.
final
- requestedInstanceCount → int?
-
The target number of instances for the instance group.
final
- runningInstanceCount → int?
-
The number of instances currently running in this instance group.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- shrinkPolicy → ShrinkPolicy?
-
Policy for customizing shrink operations.
final
- status → InstanceGroupStatus?
-
The current status of the instance group.
final
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited