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https://issues.apache.org/jira/browse/HDFS-3899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-3899:
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Hadoop Flags: Reviewed
> QJM: Writer-side metrics
> ------------------------
>
> Key: HDFS-3899
> URL: https://issues.apache.org/jira/browse/HDFS-3899
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: QuorumJournalManager (HDFS-3077)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: QuorumJournalManager (HDFS-3077)
>
> Attachments: hdfs-3899.txt, hdfs-3899.txt
>
>
> We already have some metrics on the server side (JournalNode) but it's useful
> to also gather metrics from the client side (NameNode). This is important in
> order to monitor that the client is seeing good performance from the
> individual JNs, and so that administrators can set up alerts if any of the
> JNs has become inaccessible to the NN.
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