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https://issues.apache.org/jira/browse/HADOOP-1518?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Doug Cutting updated HADOOP-1518:
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Status: Open (was: Patch Available)
The javadoc for set/getSessionId should describe what the session id is used
for, as should the description in hadoop-default.xml. Will this actually be
set in site configurations, or only programatically? If it's only set
programatically, then it doesn't need to be in hadoop-default.xml, which
primarily exists to document available parameters for site configuration, not
necessarily every parameter ever used by programs.
> 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 string.
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