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Posted to mapreduce-dev@hadoop.apache.org by "Dick King (JIRA)" <ji...@apache.org> on 2009/12/15 01:48:18 UTC

[jira] Created: (MAPREDUCE-1295) We need a job trace manipulator to build gridmix runs.

We need a job trace manipulator to build gridmix runs.
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                 Key: MAPREDUCE-1295
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1295
             Project: Hadoop Map/Reduce
          Issue Type: New Feature
            Reporter: Dick King


Rumen produces "job traces", which are JSON format files describing important aspects of all jobs that are run [successfully or not] on a hadoop map/reduce cluster.  There are two packages under development that will consume these trace files and produce actions in that cluster or another cluster: gridmix3 [see jira MAPREDUCE-1124 ] and Mumak [a simulator -- see MAPREDUCE-728 ].

It would be useful to be able to do two things with job traces, so we can run experiments using these two tools: change the duration, and change the density.  I would like to provide a "folder", a tool that can wrap a long-duration execution trace to redistribute its jobs over a shorter interval, and also change the density by duplicating or culling away jobs from the folded combined job trace.

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