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From "Maxime Brugidou (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KAFKA-845) Re-implement shallow iteration on 0.8.1
Date Wed, 03 Apr 2013 13:53:15 GMT
Maxime Brugidou created KAFKA-845:

             Summary: Re-implement shallow iteration on 0.8.1
                 Key: KAFKA-845
                 URL: https://issues.apache.org/jira/browse/KAFKA-845
             Project: Kafka
          Issue Type: Improvement
          Components: core
    Affects Versions: 0.8.1
            Reporter: Maxime Brugidou

After KAFKA-732 we decided to not support the shallow iteration feature to speed up the 0.8

This severely impacts the performance for heavy mirroring between clusters. The MirrorMaker
needs to decompress/recompress the data which actually triple the CPU compression cost in
the data flow (initial compression + 2x compression for mirroring).

It would be great to discuss a solution to re-implement the feature correctly.

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