Package org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources

Class CGroupsV2MemoryResourceHandlerImpl

java.lang.Object

org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.AbstractCGroupsMemoryResourceHandler

org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsV2MemoryResourceHandlerImpl

All Implemented Interfaces:

MemoryResourceHandler, ResourceHandler

public class CGroupsV2MemoryResourceHandlerImpl
extends AbstractCGroupsMemoryResourceHandler

Handler class to handle the memory controller. YARN already ships a physical memory monitor in Java but it isn't as good as CGroups. This handler sets the soft and hard memory limits. The soft limit is set to 90% of the hard limit.

Field Summary

Fields inherited from class org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.AbstractCGroupsMemoryResourceHandler

MEMORY, OPPORTUNISTIC_SOFT_LIMIT

Method Summary

Modifier and Type	Method	Description
protected void	updateGuaranteedMemoryLimits(String cgroupId, long containerSoftLimit)
protected void	updateMemoryHardLimit(String cgroupId, long containerHardLimit)
protected void	updateOpportunisticMemoryLimits(String cgroupId)

Methods inherited from class org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.AbstractCGroupsMemoryResourceHandler

bootstrap, getCGroupsHandler, postComplete, preStart, reacquireContainer, teardown, toString, updateContainer

Methods inherited from class java.lang.Object

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

Method Details

updateMemoryHardLimit

protected void updateMemoryHardLimit(String cgroupId,
 long containerHardLimit)
                              throws ResourceHandlerException

Specified by:

updateMemoryHardLimit in class AbstractCGroupsMemoryResourceHandler

Throws:

ResourceHandlerException

updateOpportunisticMemoryLimits

protected void updateOpportunisticMemoryLimits(String cgroupId)
                                        throws ResourceHandlerException

Specified by:

updateOpportunisticMemoryLimits in class AbstractCGroupsMemoryResourceHandler

Throws:

ResourceHandlerException

updateGuaranteedMemoryLimits

protected void updateGuaranteedMemoryLimits(String cgroupId,
 long containerSoftLimit)
                                     throws ResourceHandlerException

Specified by:

updateGuaranteedMemoryLimits in class AbstractCGroupsMemoryResourceHandler

Throws:

ResourceHandlerException