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From "Nicholas Carlini (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6837) Support for LZMA compression
Date Wed, 11 Aug 2010 17:00:41 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897337#action_12897337
] 

Nicholas Carlini commented on HADOOP-6837:
------------------------------------------

The current patch does not support LZMA2, and correct, it probably won't be included in this
patch. There will probably be another JIRA filed to swap out the current C code with the LibLzma
library to make the C side of things cleaner. LibLzma also has LZMA2 support, so that would
be free. It should be trivial to add LibLzma which has a very Zlib-like interface. And then
there will probably be another JIRA to port LibLzma to Java, and make everything nice and
clean.

> 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.non-trivial.pseudo-patch, HADOOP-6837-lzma-1-20100722.patch,
HADOOP-6837-lzma-2-20100806.patch, HADOOP-6837-lzma-3-20100809.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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