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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1518) Add session id to metric data
Date Thu, 21 Jun 2007 21:07:26 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12507029

Hadoop QA commented on HADOOP-1518:


http://issues.apache.org/jira/secure/attachment/12360319/patch.txt applied and successfully
tested against trunk revision r549577.

Test results:   http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/319/testReport/
Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/319/console

> Add session id to metric data
> -----------------------------
>                 Key: HADOOP-1518
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1518
>             Project: Hadoop
>          Issue Type: Improvement
>            Reporter: David Bowen
>            Assignee: David Bowen
>         Attachments: patch.txt
> In the context of Hadoop-On-Demand (HOD), we want to be able to aggregate metrics across
the machines in the virtual cluster that corresponds to a HOD session. To enable this, we'd
like to tag all the map/reduce related metrics with a session id.  The session id would be
a string created by HOD (it might be a Torque job id) and put into the hadoop-site.xml file
for the virtual cluster.
> The default value for the session id would be the empty string, so that non-HOD usage
of the metrics is not affected accept for the addition of a tag which is always the empty

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