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https://issues.apache.org/jira/browse/MAPREDUCE-2425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017273#comment-13017273
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Min Zhou commented on MAPREDUCE-2425:
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Amar,
This simulator is developed majorly for stressing JT and NN. It can also
verify JT's runtime behavior as mumak does. Actually, we use v0.19.1 where
rumen and mumak havenot been introduced at that time, so I developed this tool
independent from them. Now that I am planning to merge my code into mumak. But
before that, I must do 2 things list below
1. Mumak uses a simulated JT for telling TT some informations of a task-attempt
reproduced by rumen through heartbeat. I perfer using the real JT when
stressing it.
2. I should uses new MR API before merging into mumak.
> Distributed simulator for stressing JobTracker and NameNode
> -----------------------------------------------------------
>
> Key: MAPREDUCE-2425
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2425
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: benchmarks
> Reporter: Min Zhou
> Labels: benchmark, hadoop
> Fix For: 0.22.0
>
> Attachments: .jpg, screenshot-1.jpg
>
>
> Hadoop need a tool for stressing JobTracker and NameNode. Mumak introduced a
> simulated JobTracker, whose behavior doesn't exactly like that of the real
> JobTracker. Even more, mumak can't simulate a large cluster with quite a lot
> of jobs run on it. On the other hand, Gridmix v3 need hundreds of physical
> nodes to replay job stories.
> You can think this tool a complementation of mumak and gridmix v3. We
> successfully used this tool to simulate a 12000 nodes cluster through 4 real
> machines.
> I've talk to Hong Tang and Scott Chen offline, they suggested me contributing
> this tool to the hadoop community.
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