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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1261) Enhance mumak to implement a 'stress-test' for the JobTracker
Date Thu, 03 Dec 2009 06:40:21 GMT
Enhance mumak to implement a 'stress-test' for the JobTracker

                 Key: MAPREDUCE-1261
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1261
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: contrib/mumak
            Reporter: Arun C Murthy

I propose we enhance mumak to implement a proper 'stress-test' tool for the JobTracker. The
idea is that we enhance mumak to have a mode where it can use the *real* JobTracker (and Scheduler
of course) and mumak's SimulatedTaskTracker to run real workloads from production job-history
traces. Clearly we will need to make necessary changes to allow the SimulatedTaskTrackers
to run independently (a thread per SimulatedTT) in a distributed manner.

We can then simulate very large clusters and workloads using a handful of machines (say ~50
machines to simulate workload which originally ran on a 4000 node cluster), also we can use
this to stress the JobTracker with synthetic workloads.


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