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https://issues.apache.org/jira/browse/YARN-9116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16720845#comment-16720845
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Weiwei Yang commented on YARN-9116:
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Hi [~aihuaxu]
I don't see why this needs 2 options.
If global max is not set, just to configure queue max, with following convention
# Queue level max inherits the value from its parent if it is not explicitly
set
# If queue level max is set explicitly, then it is honored without considering
its parents
For the case you mentioned,
# Configure root queue max to 16G/16vcore
# Configure larger container queue to 120G/256vcore
would that work?
> Capacity Scheduler: add the default maximum-allocation-mb and
> maximum-allocation-vcores for the queues
> ------------------------------------------------------------------------------------------------------
>
> Key: YARN-9116
> URL: https://issues.apache.org/jira/browse/YARN-9116
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacity scheduler
> Affects Versions: 2.7.0
> Reporter: Aihua Xu
> Assignee: Aihua Xu
> Priority: Major
>
> YARN-1582 adds the support of maximum-allocation-mb configuration per queue
> which is targeting to support larger container features on dedicated queues
> (larger maximum-allocation-mb/maximum-allocation-vcores for such queue) .
> While to achieve larger container configuration, we need to increase the
> global maximum-allocation-mb/maximum-allocation-vcores (e.g. 120G/256) and
> then override those configurations with desired values on the queues since
> queue configuration can't be larger than cluster configuration. There are
> many queues in the system and if we forget to configure such values when
> adding a new queue, then such queue gets default 120G/256 which typically is
> not what we want.
> We can come up with a queue-default configuration (set to normal queue
> configuration like 16G/8), so the leaf queues gets such values by default.
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