org.apache.flink.runtime.scheduler.adaptivebatch

Class DefaultVertexParallelismDecider

java.lang.Object

org.apache.flink.runtime.scheduler.adaptivebatch.DefaultVertexParallelismDecider

All Implemented Interfaces:

VertexParallelismDecider

public class DefaultVertexParallelismDecider
extends Object
implements VertexParallelismDecider

Default implementation of VertexParallelismDecider. Currently, in order to make the number of subpartitions evenly consumed by downstream tasks, we will normalize the decided parallelism to a power of 2.

Method Summary

Modifier and Type	Method and Description
int	decideParallelismForVertex(List<BlockingResultInfo> consumedResults) Computing the parallelism.

Methods inherited from class java.lang.Object

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

Method Detail

decideParallelismForVertex

public int decideParallelismForVertex(List<BlockingResultInfo> consumedResults)

Description copied from interface: VertexParallelismDecider

Computing the parallelism.

Specified by:

decideParallelismForVertex in interface VertexParallelismDecider

Parameters:

consumedResults - The information of consumed blocking results.

Returns:

the parallelism of the job vertex.