Add session id to metric data
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Key: HADOOP-1518
URL: https://issues.apache.org/jira/browse/HADOOP-1518
Project: Hadoop
Issue Type: Improvement
Reporter: David Bowen
Assignee: David Bowen
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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