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https://issues.apache.org/jira/browse/HDFS-16882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tao Li resolved HDFS-16882.
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Fix Version/s: 3.4.0
Resolution: Fixed
> 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: ZhangHB
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.4.0
>
> 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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