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From "Vivek Ratan (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5199) A proposal to merge common functionality of various Schedulers
Date Mon, 09 Feb 2009 12:24:59 GMT
A proposal to merge common functionality of various Schedulers

                 Key: HADOOP-5199
                 URL: https://issues.apache.org/jira/browse/HADOOP-5199
             Project: Hadoop Core
          Issue Type: Improvement
          Components: mapred
            Reporter: Vivek Ratan

There are at least 3 Schedulers in Hadoop today: Default, Capacity, and Fairshare. Over time,
we're seeing a lot of functionality common to all three. Many bug fixes, improvements to existing
functionality, and new functionality are applicable to all three schedulers. This trend seems
to be getting stronger, as we notice similar problems, solutions, and ideas. This is a proposal
to detect and consolidate such common functionality, while at the same time, allowing for
differences in behavior and leaving the door open for other schedulers to be built, as per

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