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From "Jothi Padmanabhan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1103) Additional JobTracker metrics
Date Wed, 21 Oct 2009 05:33:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12768087#action_12768087
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Jothi Padmanabhan commented on MAPREDUCE-1103:
----------------------------------------------

Few points:

# Weighted methods could be removed from JobTrackerInstrumentation and JTMetricsInst
# JTMetricsInst.setMapSlots should also be synchronized
# Should we rename addBlacklistedTracker to addBlackListedTrackers, to be consistent with
the other method names. Similarly for decBlackListedTracker, addTracker, decTracker
# There are some if else statements without the braces. I think we follow the style convention
of having braces for if-else even if they are one line statements

> Additional JobTracker metrics
> -----------------------------
>
>                 Key: MAPREDUCE-1103
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1103
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobtracker
>    Affects Versions: 0.21.0
>            Reporter: Arun C Murthy
>            Assignee: Sharad Agarwal
>             Fix For: 0.21.0
>
>         Attachments: 1103.patch, 1103.patch, 1103_v1.patch, 1103_v2.patch, 1103_v3.patch
>
>
> It would be useful for tracking the following additional JobTracker metrics:
> running{map|reduce}tasks
> busy{map|reduce}slots
> reserved{map|reduce}slots

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