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From "Thomas Jungblut (Updated) (JIRA)" <>
Subject [jira] [Updated] (HAMA-516) Implement Worker Pool
Date Fri, 02 Mar 2012 21:45:56 GMT


Thomas Jungblut updated HAMA-516:

    Issue Type: Sub-task  (was: Improvement)
        Parent: HAMA-520
> Implement Worker Pool
> ---------------------
>                 Key: HAMA-516
>                 URL:
>             Project: Hama
>          Issue Type: Sub-task
>    Affects Versions: 0.4.0
>            Reporter: Thomas Jungblut
>            Priority: Minor
>             Fix For: 0.5.0
> To decrease job startup time we should implement worker pools.
> Worker pools should start BSPTask JVM's based on the configured task capacity.
> This should greatly improve cold-start time for jobs. However, this cost is quite low
compared to the long-running Hama task.
> The idea is from
(slide 4). Google Tenzing uses this, and I read about the gmail priority inbox jobs which
also uses this task reuse.
> This will be the start of a number of tasks that will profile and improve startup time
of jobs and cluster. (Umbrella follows).

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