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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-2542) [Gridmix] Add support for LZO codec in Gridmix
Date Sun, 29 May 2011 03:13:47 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amar Kamat updated MAPREDUCE-2542:
----------------------------------

    Attachment: compression-ratio-dictsize-500-data-100mb-lzo.png

Attaching a plot of dictionary-word-size to compression ratio for a fixed dictionary size
of 500 words and fixed data size of 100mb. I will publish the text version of the table too
which can be used for compiling the compression lookup table.

> [Gridmix] Add support for LZO codec in Gridmix
> ----------------------------------------------
>
>                 Key: MAPREDUCE-2542
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2542
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/gridmix
>            Reporter: Amar Kamat
>             Fix For: 0.23.0
>
>         Attachments: compression-ratio-dictsize-500-data-100mb-lzo.png
>
>
> MAPREDUCE-2408 adds compression emulation support in Gridmix. It supports the commonly
used default codec (i.e Gzip). It seems that even LZO codec shows similar pattern w.r.t dictionary-word-size
and compression-ratio. It would be nice to emulate LZO codec in Gridmix.

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