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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3957) Change MutableQuantiles to use a shared thread for rolling over metrics
Date Tue, 25 Sep 2012 23:18:08 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3957?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Todd Lipcon updated HDFS-3957:

       Resolution: Fixed
    Fix Version/s: 2.0.3-alpha
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)
> Change MutableQuantiles to use a shared thread for rolling over metrics
> -----------------------------------------------------------------------
>                 Key: HDFS-3957
>                 URL: https://issues.apache.org/jira/browse/HDFS-3957
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.0.3-alpha
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>            Priority: Minor
>             Fix For: 3.0.0, 2.0.3-alpha
>         Attachments: hdfs-3957-1.patch, hdfs-3957-2.patch
> Each MutableQuantiles currently creates its own thread to rollover the histogram every
interval. It'd be better to do this with a single, shared thread or executor, and do it with
a ThreadFactory that names it properly.
> Similar changes were made when porting MutableQuantiles to HBase in HBASE-6409, so this
would also help keep them in sync.

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