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Posted to mapreduce-dev@hadoop.apache.org by "Forest Tan (JIRA)" <ji...@apache.org> on 2011/09/05 10:47:10 UTC

[jira] [Created] (MAPREDUCE-2931) CLONE - LocalJobRunner should support parallel mapper execution

CLONE - LocalJobRunner should support parallel mapper execution
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                 Key: MAPREDUCE-2931
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2931
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
            Reporter: Forest Tan
            Assignee: Aaron Kimball
             Fix For: 0.21.0


The LocalJobRunner currently supports only a single execution thread. Given the prevalence of multi-core CPUs, it makes sense to allow users to run multiple tasks in parallel for improved performance on small (local-only) jobs.

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