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https://issues.apache.org/jira/browse/HDFS-14045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16672845#comment-16672845
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Weiwei Yang commented on HDFS-14045:
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Hi [~yangjiandan]
Thanks for creating this and working on this. Some high-level questions
regarding to the patch,
# does this work in non-HA environment?
# does this work if HDFS federation is enabled?
I am thinking, maybe we can use namespaceID (as that is part of the
DatanodeRegistration info) to differentiate metrics for different namenodes?
Would that be more general?
Not sure if the metrics system allow us to dynamically add new entries though.
Thanks
> 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
> Assignee: Jiandan Yang
> Priority: Major
> Attachments: HDFS-14045.001.patch
>
>
> 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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