org.apache.flink.runtime.scheduler.adaptive.scalingpolicy

Class EnforceMinimalIncreaseRescalingController

java.lang.Object

org.apache.flink.runtime.scheduler.adaptive.scalingpolicy.EnforceMinimalIncreaseRescalingController

All Implemented Interfaces:

RescalingController

public class EnforceMinimalIncreaseRescalingController
extends Object
implements RescalingController

Simple scaling policy. The user can configure a minimum cumulative parallelism increase to allow a scale up.

Constructor Summary

Constructors

Constructor and Description
EnforceMinimalIncreaseRescalingController(org.apache.flink.configuration.Configuration configuration)

Method Summary

Modifier and Type	Method and Description
boolean	shouldRescale(VertexParallelism currentParallelism, VertexParallelism newParallelism) This method gets called whenever new resources or resource requirements are available and the scheduler needs to design whether to rescale or not.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EnforceMinimalIncreaseRescalingController

public EnforceMinimalIncreaseRescalingController(org.apache.flink.configuration.Configuration configuration)

Method Detail

shouldRescale

public boolean shouldRescale(VertexParallelism currentParallelism,
                             VertexParallelism newParallelism)

Description copied from interface: RescalingController

This method gets called whenever new resources or resource requirements are available and the scheduler needs to design whether to rescale or not.

Specified by:

shouldRescale in interface RescalingController

Parameters:

currentParallelism - parallelism of the currently running job graph.

newParallelism - Potential new parallelism with the additional resources.

Returns:

true if the policy decided to rescale based on the provided information.