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https://issues.apache.org/jira/browse/HDFS-14045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16678546#comment-16678546
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Weiwei Yang commented on HDFS-14045:
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Hi [~xkrogen].
{quote}If you're worried about whether or not it's possible to create metric
names with dynamic names, it is definitely possible.
{quote}
Thanks for letting me know. In this case, I like the idea to use separate
metrics for each NN. This way it works consistently for every environment, also
helps to avoid confusion.
{quote}They'll be covered by the {{RpcMetrics}} for the NameNode service port,
but it can also be really useful to have metrics measured at client-side rather
than the server-side
{quote}
Makes sense.
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, HDFS-14045.002.patch,
> HDFS-14045.003.patch, HDFS-14045.004.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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