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From "Thomas Jungblut (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HAMA-516) Implement Worker Pool
Date Fri, 24 Feb 2012 15:16:48 GMT
Implement Worker Pool
---------------------

                 Key: HAMA-516
                 URL: https://issues.apache.org/jira/browse/HAMA-516
             Project: Hama
          Issue Type: Improvement
    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 http://www.slideshare.net/hanborq/hanborq-optimizations-on-hadoop-mapreduce-20120216a
(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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