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Posted to issues@hbase.apache.org by "Michele Catasta (JIRA)" <ji...@apache.org> on 2010/06/02 15:51:37 UTC
[jira] Updated: (HBASE-2655) 2-pass compression support
[ https://issues.apache.org/jira/browse/HBASE-2655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michele Catasta updated HBASE-2655:
-----------------------------------
Attachment: HBASE-2655.diff
> 2-pass compression support
> --------------------------
>
> Key: HBASE-2655
> URL: https://issues.apache.org/jira/browse/HBASE-2655
> Project: HBase
> Issue Type: New Feature
> Components: io
> Reporter: Michele Catasta
> Priority: Minor
> Fix For: 0.21.0
>
> Attachments: HBASE-2655.diff
>
>
> Quoting from BigTable paper: "Many clients use a two-pass custom compression scheme. The first pass uses Bentley and McIlroy's scheme, which compresses long common strings across a large window. The second pass uses a fast compression algorithm that looks for repetitions in a small 16 KB window of the data. Both compression passes are very fast—they encode at 100-200 MB/s, and decode at 400-1000 MB/s on modern machines."
> The goal of this patch is to integrate a similar compression scheme in HBase.
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