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From "Jiandan Yang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-14045) Use different metrics in DataNode to better measure latency of heartbeat/blockReports/incrementalBlockReports of Active/Standby NN
Date Fri, 02 Nov 2018 03:25:00 GMT
Jiandan Yang  created HDFS-14045:
------------------------------------

             Summary: Use different metrics in DataNode to better measure latency of heartbeat/blockReports/incrementalBlockReports
of Active/Standby NN
                 Key: HDFS-14045
                 URL: https://issues.apache.org/jira/browse/HDFS-14045
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
            Reporter: Jiandan Yang 


Currently DataNode uses same metrics to measure rpc latency of NameNode, but Active and Standby
usually have different performance at the same time, especially in large cluster. For example,
rpc latency of Standby is very long when Standby is catching up editlog. We may misunderstand
the state of HDFS. Using different metrics for Active and standby can help us obtain more
precise metric data.



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