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From "Kai Ren (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1873) Add a metrics instrumentation class to collect metrics about fair share scheduler
Date Wed, 16 Jun 2010 18:26:24 GMT
Add a metrics instrumentation class to collect metrics about fair share scheduler
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                 Key: MAPREDUCE-1873
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1873
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: contrib/fair-share
    Affects Versions: 0.22.0
            Reporter: Kai Ren


Export the following metrics:

1. num of starved jobs (jobs that get slots less then their fair share defined in fair scheduler)
2. num of starved pools (pools that get assigned map or reduce less than its min map slots
or min reduce slots.
3. num of active pools
4. total min maps
5. total max maps
6. total min reduces
7. total max reduces

3~7 are available in FairSchedulerServlet. To report here is to create another metrics data
export path so that these metrics can be displayed in ODS, jmx or ganglia.

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