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https://issues.apache.org/jira/browse/HDFS-16882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17725171#comment-17725171
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Ayush Saxena commented on HDFS-16882:
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Committer to branch-3.
Thanx [~zhanghaobo] for the contribution!!!
> RBF: Add cache hit rate metric in MountTableResolver#getDestinationForPath
> --------------------------------------------------------------------------
>
> Key: HDFS-16882
> URL: https://issues.apache.org/jira/browse/HDFS-16882
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: rbf
> Affects Versions: 3.3.4
> Reporter: farmmamba
> Assignee: farmmamba
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.4.0, 3.3.9
>
> Attachments: locationCache.png
>
>
> Currently, the default value of
> "dfs.federation.router.mount-table.cache.enable" is true and the default
> value of "dfs.federation.router.mount-table.max-cache-size" is 10000.
> But there is no metric that display cache hit rate, I think we can add a hit
> rate metric to watch the Cache performance and better tuning the parameters.
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