org.apache.flink.runtime.scheduler

接口 VertexParallelismInformation

所有已知实现类:

DefaultVertexParallelismInfo

public interface VertexParallelismInformation

Manages the parallelism properties for a vertex in the execution graph, as well as how they can change during runtime.

方法概要

限定符和类型	方法和说明
boolean	canRescaleMaxParallelism(int desiredMaxParallelism) Returns whether the vertex's max parallelism can be changed to a given value.
int	getMaxParallelism() Returns the vertex's max parallelism.
int	getParallelism() Returns a vertex's parallelism.
void	setMaxParallelism(int maxParallelism) Changes a given vertex's max parallelism property.

方法详细资料

getParallelism

int getParallelism()

Returns a vertex's parallelism.

返回:

the parallelism for the vertex

getMaxParallelism

int getMaxParallelism()

Returns the vertex's max parallelism.

返回:

the max parallelism for the vertex

setMaxParallelism

void setMaxParallelism(int maxParallelism)

Changes a given vertex's max parallelism property. The caller should first check the validity of the new setting via canRescaleMaxParallelism(int), otherwise this operation may fail.

参数:

maxParallelism - the new max parallelism for the vertex

canRescaleMaxParallelism

boolean canRescaleMaxParallelism(int desiredMaxParallelism)

Returns whether the vertex's max parallelism can be changed to a given value.

参数:

desiredMaxParallelism - the desired max parallelism for the vertex

返回:

whether the max parallelism can be changed to the given value