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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5733) Add map/reduce slot capacity and lost map/reduce slot capacity to JobTracker metrics
Date Mon, 04 May 2009 08:27:30 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12705523#action_12705523
] 

Chris Douglas commented on HADOOP-5733:
---------------------------------------

* When using {{setMetric}}, doUpdates shouldn't reset the metric to 0
* set\*Slots doesn't need to be adjusted in add/removeHostCapacity, as in the original patch?

> Add map/reduce slot capacity and lost map/reduce slot capacity to JobTracker metrics
> ------------------------------------------------------------------------------------
>
>                 Key: HADOOP-5733
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5733
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred, metrics
>            Reporter: Hong Tang
>         Attachments: hadoop-5733-1.patch, hadoop-5733-2.patch
>
>
> It would be nice to have the actual map/reduce slot capacity and the lost map/reduce
slot capacity (# of blacklisted nodes * map-slot-per-node or reduce-slot-per-node). This information
can be used to calculate a JT view of slot utilization.

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