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https://issues.apache.org/jira/browse/MAPREDUCE-1229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12784382#action_12784382
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Hong Tang commented on MAPREDUCE-1229:
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After sitting on it overnight, I think I can simplify isOverloaded() by
eliminating the check of occupied map slot percentage and use mainly pending
map task count, which seems to be updated by job tracker right after job
submission. This would allow me to ramping up the load to the cluster at a
rapid rate of one job per mili-second without worrying about overshooting.
Will upload a patch shortly.
> [Mumak] Allow customization of job submission policy
> ----------------------------------------------------
>
> Key: MAPREDUCE-1229
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1229
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/mumak
> Affects Versions: 0.21.0, 0.22.0
> Reporter: Hong Tang
> Assignee: Hong Tang
> Fix For: 0.21.0, 0.22.0
>
> Attachments: mapreduce-1229-20091121.patch,
> mapreduce-1229-20091123.patch, mapreduce-1229-20091130.patch
>
>
> Currently, mumak replay job submission faithfully. To make mumak useful for
> evaluation purposes, it would be great if we can support other job submission
> policies such as sequential job submission, or stress job submission.
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