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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2019/06/17 03:15:38 UTC
[GitHub] [hadoop] dpvelasquez opened a new pull request #976: YARN-2695.
Added support for reservation continue looking with node labels
dpvelasquez opened a new pull request #976: YARN-2695. Added support for reservation continue looking with node labels
URL: https://github.com/apache/hadoop/pull/976
When a resource deprived node is scheduled by resource manager,
capacity scheduler will reserve a container on this node even though
there are resources available on other nodes. Since reserved containers
take up headroom, sometimes resources available on other nodes will
never be utilized. After this change, headroom calculation will include
resources that could be unreserved on other nodes in the same partition,
and unreserve the container after allocation of another container on the
scheduled node.
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