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Date: Sun, 8 Jun 2014 21:59:02 +0000 (UTC)
From: "Andrew Purtell (JIRA)" <jira@apache.org>
To: dev@hbase.apache.org
Message-ID: <JIRA.12465964.1275486404388.90795.1402264742826@arcas>
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Subject: [jira] [Resolved] (HBASE-2655) 2-pass compression support
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     [ https://issues.apache.org/jira/browse/HBASE-2655?page=3Dcom.atlassia=
n.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell resolved HBASE-2655.
-----------------------------------

    Resolution: Won't Fix

Stale issue. Reopen if still relevant (if there's new activity)

> 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
>         Attachments: HBASE-2655.patch
>
>
> Quoting from BigTable paper: "Many clients use a two-pass custom compress=
ion scheme. The first pass uses Bentley and McIlroy's scheme, which compres=
ses 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=E2=80=94they 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 HB=
ase.


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