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From "Matt Foley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5227) JobTrackerMetricsSource and QueueMetrics should standardize naming rules
Date Sun, 07 Jul 2013 05:21:49 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13701510#comment-13701510
] 

Matt Foley commented on MAPREDUCE-5227:
---------------------------------------

Needs review by MapReduce subject area experts.  Pushing to release 1.3.0, pending review.
                
> JobTrackerMetricsSource and QueueMetrics should standardize naming rules
> ------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5227
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5227
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv1
>    Affects Versions: 1.1.3, 1.2.1
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>            Priority: Minor
>         Attachments: MAPREDUCE-5227-1.1-branch.1.patch, MAPREDUCE-5227.1.patch, MAPREDUCE-5227-branch-1.1.patch
>
>
> JobTrackerMetricsSource and QueueMetrics provides users with some metrics, but its naming
rules( "jobs_running", "running_maps", "running_reduces") sometimes confuses users. It should
be standardized.
> One concern is backward compatibility, so one idea is to share MetricMutableGaugeInt
object from old and new property name.
> e.g. to share runningMaps from "running_maps" and "maps_running".

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