org.apache.hadoop.dynamodb.util

Class RoundRobinYarnContainerAllocator

java.lang.Object

org.apache.hadoop.dynamodb.util.RoundRobinYarnContainerAllocator

All Implemented Interfaces:

YarnContainerAllocator

public class RoundRobinYarnContainerAllocator
extends Object
implements YarnContainerAllocator

Constructor Summary

Constructors

Constructor and Description
RoundRobinYarnContainerAllocator()

Method Summary

Modifier and Type	Method and Description
int	getMaxMappers(int nodes, int reducers, int nodeSlots, int appMasterSlots, int mapSlots, int reduceSlots) Calculates the max number of mappers based on the cluster configuration.

Methods inherited from class java.lang.Object

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

Constructor Detail

RoundRobinYarnContainerAllocator

public RoundRobinYarnContainerAllocator()

Method Detail

getMaxMappers

public int getMaxMappers(int nodes,
                         int reducers,
                         int nodeSlots,
                         int appMasterSlots,
                         int mapSlots,
                         int reduceSlots)

Calculates the max number of mappers based on the cluster configuration.

Specified by:

getMaxMappers in interface YarnContainerAllocator

Parameters:

nodes - number of core nodes

reducers - number of reducers

nodeSlots - number of slots in a core node

appMasterSlots - number of slots for an application master

mapSlots - number of slots for a mapper

reduceSlots - number of slots for a reducer

Returns:

the calculated max number of mappers