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From "Sreekanth Ramakrishnan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5733) Add map/reduce slot capacity and lost map/reduce slot capacity to JobTracker metrics
Date Mon, 04 May 2009 06:53:31 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5733?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sreekanth Ramakrishnan updated HADOOP-5733:
-------------------------------------------

    Attachment: hadoop-5733-2.patch

Attaching patch incorporating the comment:

* Changed map slot and reduce slot metric from {{incrMetric}} to {{setMetric}}
* Changed the field holding, map slots and reduce slots to volatile, so the setters need not
be synchronized.
* The maps and reduce slot is set in {{updateTaskTrackerStatus}} in {{JobTracker}}
* The setters for black listed slots have been made synchronized.

> 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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