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From "Nicholas Telford (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-3691) Add compressor support for 'snappy', google's compressor
Date Mon, 09 May 2011 09:51:03 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3691?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nicholas Telford updated HBASE-3691:
------------------------------------

    Attachment: hbase-snappy-3691-trunk-004.patch

Moved Compression.Algorithm.SNAPPY to end of enum to retain backwards compatibility with existing
HFiles.

Otherwise, patch is same as 003

> Add compressor support for 'snappy', google's compressor
> --------------------------------------------------------
>
>                 Key: HBASE-3691
>                 URL: https://issues.apache.org/jira/browse/HBASE-3691
>             Project: HBase
>          Issue Type: Task
>            Reporter: stack
>            Priority: Critical
>             Fix For: 0.92.0
>
>         Attachments: hbase-snappy-3691-trunk-002.patch, hbase-snappy-3691-trunk-003.patch,
hbase-snappy-3691-trunk-004.patch, hbase-snappy-3691-trunk.patch
>
>
> http://code.google.com/p/snappy/ is apache licensed.
> bq. Snappy is a compression/decompression library. It does not aim for maximum compression,
or compatibility with any other compression library; instead, it aims for very high speeds
and reasonable compression. For instance, compared to the fastest mode of zlib, Snappy is
an order of magnitude faster for most inputs, but the resulting compressed files are anywhere
from 20% to 100% bigger. On a single core of a Core i7 processor in 64-bit mode, Snappy compresses
at about 250 MB/sec or more and decompresses at about 500 MB/sec or more.
> bq. Snappy is widely used inside Google, in everything from BigTable and MapReduce to
our internal RPC systems. (Snappy has previously been referred to as "Zippy" in some presentations
and the likes.)
> Lets get it in.

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