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https://issues.apache.org/jira/browse/HDFS-2510?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-2510:
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Component/s: ha
> Add HA-related metrics
> ----------------------
>
> Key: HDFS-2510
> URL: https://issues.apache.org/jira/browse/HDFS-2510
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, ha, name-node
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Aaron T. Myers
> Assignee: Aaron T. Myers
>
> Off the top of my head, I can think of:
> NN metrics:
> * A binary metric for active or standby
> * The size of the pending DN message queues
> * A timestamp for when the standby NN last read from shared edit log
> * The difference between highest generation stamp seen from the shared edit
> log and the highest generation stamp seen from any DN
> It would probably also be useful to have a DN metric which somehow describes
> which active/standby NNs its talking to, e.g. "times since last communicated
> with standby/active NNs."
> I'm sure there are others as well. Comments strongly encouraged.
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