org.apache.hadoop.yarn.server.nodemanager.util

Class NodeManagerHardwareUtils

java.lang.Object

org.apache.hadoop.yarn.server.nodemanager.util.NodeManagerHardwareUtils

@InterfaceAudience.Private
 @InterfaceStability.Unstable
public class NodeManagerHardwareUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
NodeManagerHardwareUtils()

Method Summary

Modifier and Type	Method and Description
static float	getContainersCores(org.apache.hadoop.conf.Configuration conf) Returns the fraction of CPU cores that should be used for YARN containers.
static float	getContainersCores(org.apache.hadoop.yarn.util.ResourceCalculatorPlugin plugin, org.apache.hadoop.conf.Configuration conf) Returns the fraction of CPU cores that should be used for YARN containers.
static int	getNodeCpuPercentage(org.apache.hadoop.conf.Configuration conf) Gets the percentage of physical CPU that is configured for YARN containers.

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeManagerHardwareUtils

public NodeManagerHardwareUtils()

Method Detail

getContainersCores

public static float getContainersCores(org.apache.hadoop.conf.Configuration conf)

Returns the fraction of CPU cores that should be used for YARN containers. The number is derived based on various configuration params such as YarnConfiguration.NM_RESOURCE_PERCENTAGE_PHYSICAL_CPU_LIMIT

Parameters:

conf - - Configuration object

Returns:

Fraction of CPU cores to be used for YARN containers

getContainersCores

public static float getContainersCores(org.apache.hadoop.yarn.util.ResourceCalculatorPlugin plugin,
                                       org.apache.hadoop.conf.Configuration conf)

Returns the fraction of CPU cores that should be used for YARN containers. The number is derived based on various configuration params such as YarnConfiguration.NM_RESOURCE_PERCENTAGE_PHYSICAL_CPU_LIMIT

Parameters:

plugin - - ResourceCalculatorPlugin object to determine hardware specs

conf - - Configuration object

Returns:

Fraction of CPU cores to be used for YARN containers

getNodeCpuPercentage

public static int getNodeCpuPercentage(org.apache.hadoop.conf.Configuration conf)

Gets the percentage of physical CPU that is configured for YARN containers. This is percent > 0 and <= 100 based on YarnConfiguration.NM_RESOURCE_PERCENTAGE_PHYSICAL_CPU_LIMIT

Parameters:

conf - Configuration object

Returns:

percent > 0 and <= 100