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https://issues.apache.org/jira/browse/YARN-9634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16870034#comment-16870034
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zhuqi commented on YARN-9634:
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Hi, [~Tao Yang].
Thanks for comment. I have changed my description, as [~cheersyang] commented,
my focus is if we can distributed these dirs among multi federation dirs, to
get better namenode performance for my HDFS federation. But will affect some
other logic, the details should be considered.
> Make yarn submit dir and log aggregation dir more evenly distributed
> --------------------------------------------------------------------
>
> Key: YARN-9634
> URL: https://issues.apache.org/jira/browse/YARN-9634
> Project: Hadoop YARN
> Issue Type: Improvement
> Affects Versions: 3.2.0
> Reporter: zhuqi
> Assignee: zhuqi
> Priority: Major
>
> When the cluster size is large, the dir which user submits the job, and the
> dir which container log aggregate, and other information will fill the HDFS
> directory, because the HDFS directory has a default storage limit, this can
> be configured by "yarn.log-aggregation.retain-seconds" to solve. But the
> FSNamesystemLock#writeLock and rpc operation which these dir operation
> triggered will affect the namespace which these dirs are located, in order to
> get this better we have let this dir in one single HDFS federation namespace,
> but with the cluster become huge, the single namespace will also affect the
> rpc performance. In response to this situation, we can change these dirs more
> distributed among multi namespace dirs, with some policy to choose, such as
> hash policy and round robin policy.
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