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From "Tsuyoshi Ozawa (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TEZ-2605) [Umbrella] CPU optimizations for hotspots
Date Wed, 08 Jul 2015 15:14:05 GMT
Tsuyoshi Ozawa created TEZ-2605:

             Summary: [Umbrella] CPU optimizations for hotspots
                 Key: TEZ-2605
                 URL: https://issues.apache.org/jira/browse/TEZ-2605
             Project: Apache Tez
          Issue Type: Improvement
            Reporter: Tsuyoshi Ozawa

There are some CPU hotpots when processing large data when IO is highly optimized:

1. Sort : memory access to compare with 2 values can be bottleneck.
2. Aggregation : hash construction for UnorderedPartitionedKVWriter can be bottleneck.
3. Filter : memory access to compare the key values with given condition.

This issue is a umbrella jira for CPU optmizations at Tez side.

Related works:
Alphasort: http://dl.acm.org/citation.cfm?id=615237

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