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From "Varun Vasudev (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-3542) Re-factor support for CPU as a resource using the new ResourceHandler mechanism
Date Tue, 15 Dec 2015 15:18:46 GMT

     [ https://issues.apache.org/jira/browse/YARN-3542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Varun Vasudev updated YARN-3542:
--------------------------------
    Attachment: YARN-3542.004.patch

Uploaded a new patch to address [~sidharta-s]'s comments.

bq. unused imports in CGroupsCpuResourceHandlerImpl

Fixed.

bq. Move these to CGroupsHandler ?

Fixed.

bq. About how shares/cfs_period_us/cfs_quota_us are used : additional comments/documentation
and examples (as unit tests?) would be useful. It took me a while to trace through the code
using some examples. 

Added comments on how they're used. I also added a bunch of new unit tests.

bq. Since the class has been marked deprecated, is it necessary to make the rest of the changes
that are included ?

I think the class should exist as is for now - the unit tests for the class would fail without
the changes. We can decide later whether to remove it entirely.

bq. IMO, all references to LCEResourcesHandler (and sub-classes) should be removed from LinuxContainerExecutor.


The LCEResourcesHandler is a public API(exposed via yarn-site.xml) - users may have implemented
their own. Removing it would mean breaking backwards compatibility.

> Re-factor support for CPU as a resource using the new ResourceHandler mechanism
> -------------------------------------------------------------------------------
>
>                 Key: YARN-3542
>                 URL: https://issues.apache.org/jira/browse/YARN-3542
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>            Reporter: Sidharta Seethana
>            Assignee: Sidharta Seethana
>            Priority: Critical
>         Attachments: YARN-3542.001.patch, YARN-3542.002.patch, YARN-3542.003.patch, YARN-3542.004.patch
>
>
> In YARN-3443 , a new ResourceHandler mechanism was added which enabled easier addition
of new resource types in the nodemanager (this was used for network as a resource - See YARN-2140
). We should refactor the existing CPU implementation ( LinuxContainerExecutor/CgroupsLCEResourcesHandler
) using the new ResourceHandler mechanism. 



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