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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-3899) QJM: Writer-side metrics
Date Mon, 10 Sep 2012 22:42:08 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon resolved HDFS-3899.
-------------------------------

       Resolution: Fixed
    Fix Version/s: QuorumJournalManager (HDFS-3077)

Committed to branch, thx.
                
> 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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