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Posted to hdfs-issues@hadoop.apache.org by "Yongpan Liu (Jira)" <ji...@apache.org> on 2022/06/04 02:32:00 UTC

[jira] [Created] (HDFS-16617) [SBN read] add txid lag metric for Observer NameNode

Yongpan Liu created HDFS-16617:
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             Summary: [SBN read] add txid lag metric for Observer NameNode
                 Key: HDFS-16617
                 URL: https://issues.apache.org/jira/browse/HDFS-16617
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namenode
            Reporter: Yongpan Liu


Observer NN may of course have poor read performance due to various reasons (serious GC, code problems, or txid lags behind, etc.).
Adding latency monitoring with Active NN's txid to Observer NN can help us troubleshoot issues.



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