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Posted to mapreduce-dev@hadoop.apache.org by "Owen O'Malley (JIRA)" <ji...@apache.org> on 2012/08/01 20:58:02 UTC
[jira] [Created] (MAPREDUCE-4505) Create a combiner bypass path for
keys with a single value
Owen O'Malley created MAPREDUCE-4505:
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Summary: Create a combiner bypass path for keys with a single value
Key: MAPREDUCE-4505
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4505
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: performance, task
Reporter: Owen O'Malley
It would help optimize a lot of cases where there aren't a lot of replicated keys if the framework would bypass the deserialize/combiner/serialize step for keys that only have a single value.
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