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From "Johan Oskarsson (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4640) Add ability to split text files compressed with lzo
Date Wed, 12 Nov 2008 13:57:44 GMT
Add ability to split text files compressed with lzo
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                 Key: HADOOP-4640
                 URL: https://issues.apache.org/jira/browse/HADOOP-4640
             Project: Hadoop Core
          Issue Type: Improvement
          Components: io, mapred
            Reporter: Johan Oskarsson
            Priority: Trivial


Right now any file compressed with lzop will be processed by one mapper. This is a shame since
the lzo algorithm would be very suitable for large log files and similar common hadoop data
sets. The compression rate is not the best out there but the decompression speed is amazing.
 Since lzo writes compressed data in blocks it would be possible to make an input format that
can split the files.


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