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

Class EnforceParallelismChangeRescalingController

java.lang.Object

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

All Implemented Interfaces:

RescalingController

public class EnforceParallelismChangeRescalingController
extends Object
implements RescalingController

Simple scaling policy. It just checks that the new parallelism is different (either increase or decrease) from the current parallelism.

Constructor Summary

Constructors

Constructor and Description
EnforceParallelismChangeRescalingController()

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

EnforceParallelismChangeRescalingController

public EnforceParallelismChangeRescalingController()

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.