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Posted to hdfs-dev@hadoop.apache.org by "ZhangHB (Jira)" <ji...@apache.org> on 2023/01/04 02:41:00 UTC

[jira] [Created] (HDFS-16882) Add cache hit rate metric in MountTableResolver#getDestinationForPath

ZhangHB created HDFS-16882:
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             Summary: 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


Currently,  the default value of "dfs.federation.router.mount-table.cache.enable" is ture，

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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