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https://issues.apache.org/jira/browse/MAPREDUCE-2425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017315#comment-13017315
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Min Zhou commented on MAPREDUCE-2425:
-------------------------------------

btw, this tool can stress RPC as well. 

> 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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