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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MAPREDUCE-2105) Simulate Load Incrementally and Adaptively in GridMix3
Date Wed, 15 Jun 2011 11:04:49 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amar Kamat resolved MAPREDUCE-2105.
-----------------------------------

             Tags: gridmix emulation plugin
       Resolution: Fixed
    Fix Version/s: 0.23.0
         Assignee: Amar Kamat

Committed as part of MAPREDUCE-2106.

> Simulate Load Incrementally and Adaptively in GridMix3
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-2105
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2105
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/gridmix
>    Affects Versions: 0.22.0
>            Reporter: Ranjit Mathew
>            Assignee: Amar Kamat
>             Fix For: 0.23.0
>
>
> Tasks launched by GridMix3 should incrementally and adaptively simulate load (I/O, CPU,
memory, etc.) rather than doing
> everything upfront and then sleeping. This helps in evening out the load when fine-grained
information from the original
> Task is not available and greater accuracy when it is.
> By "incremental" I mean having several iterations corresponding to appropriate phases/time-slices.
By "adaptive" I mean
> taking the existing load into account before inflicting additional load to meet a target
load (we are unlikely to achieve
> 100% fidelity as we overshoot or undershoot with each iteration).

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