org.apache.hadoop.dynamodb.util

Interface YarnContainerAllocator

All Known Implementing Classes:

RoundRobinYarnContainerAllocator

public interface YarnContainerAllocator

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.

Method Detail

getMaxMappers

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.

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