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https://issues.apache.org/jira/browse/YARN-2440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Varun Vasudev updated YARN-2440:
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Attachment: apache-yarn-2440.6.patch
Uploaded new patch to address Vinod's comments.
{quote}
{noformat}
<property>
+ <description>Percentage of CPU that can be allocated
+ for containers. This setting allows users to limit the number of
+ physical cores that YARN containers use. Currently functional only
+ on Linux using cgroups. The default is to use 100% of CPU.
+ </description>
+ <name>yarn.nodemanager.resource.percentage-physical-cpu-limit</name>
+ <value>100</value>
+ </property>
{noformat}
"the number of physical cores" part isn't really right. It actually is 75%
across all cores, for e.g. We have this sort of "number of physical cores"
description in multiple places, let's fix that? For instance, in
NodeManagerHardwareUtils, yarn-default.xml etc.
{quote}
Fixed.
{quote}
Also,
NM_CONTAINERS_CPU_PERC -> NM_RESOURCE_PHYSICAL_CPU_LIMIT
Similarly rename DEFAULT_NM_CONTAINERS_CPU_PERC
{quote}
Done, I'd prefer to have percentage as part of the name. I've changed it to
NM_RESOURCE_PERCENTAGE_PHYSICAL_CPU_LIMIT and
DEFAULT_NM_RESOURCE_PERCENTAGE_PHYSICAL_CPU_LIMIT.
> Cgroups should allow YARN containers to be limited to allocated cores
> ---------------------------------------------------------------------
>
> Key: YARN-2440
> URL: https://issues.apache.org/jira/browse/YARN-2440
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Varun Vasudev
> Assignee: Varun Vasudev
> Attachments: apache-yarn-2440.0.patch, apache-yarn-2440.1.patch,
> apache-yarn-2440.2.patch, apache-yarn-2440.3.patch, apache-yarn-2440.4.patch,
> apache-yarn-2440.5.patch, apache-yarn-2440.6.patch,
> screenshot-current-implementation.jpg
>
>
> The current cgroups implementation does not limit YARN containers to the
> cores allocated in yarn-site.xml.
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