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From "Nicholas Carlini (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6837) Support for LZMA compression
Date Thu, 22 Jul 2010 16:56:59 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6837?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nicholas Carlini updated HADOOP-6837:
-------------------------------------

    Attachment: HADOOP-6837-lzma-1-20100722.patch

Attached a patch merging the java and c code together. Fixed two bugs in the C code, and removed
some unneeded methods/arguments. Ran TestCodec on both of them for several hours each, and
didn't find any bugs. Tested (again with TestCodec) all possible dictionary sizes from 1<<12
to 1<<23. Also added more (much needed) documentation.

> Support for LZMA compression
> ----------------------------
>
>                 Key: HADOOP-6837
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6837
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>            Reporter: Nicholas Carlini
>            Assignee: Nicholas Carlini
>         Attachments: HADOOP-6837-lzma-1-20100722.patch, HADOOP-6837-lzma-c-20100719.patch,
HADOOP-6837-lzma-java-20100623.patch
>
>
> Add support for LZMA (http://www.7-zip.org/sdk.html) compression, which generally achieves
higher compression ratios than both gzip and bzip2.

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