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From "Michele (@pirroh) Catasta (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5793) High speed compression algorithm like BMDiff
Date Wed, 02 Jun 2010 15:45:51 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12874620#action_12874620

Michele (@pirroh) Catasta commented on HADOOP-5793:

{quote} How would it work? {quote}

Same steps for hadoop-gpl-compression installation. I updated the build scripts and no other
external libraries are needed, so it should be straightforward.

{quote} Whats the name of the compression that does both bmz and lzo?{quote}


{quote}We'd download hadoop gpl stuff, compile it and then refer to the new combo... how?
(Sounds great){quote} 

You already found out, but for HBase I already submitted HBASE-2655

{quote}This code came over from HT?{quote}

Exactly. [http://www.hypertable.org/doxygen/bmz_8h.html] - few changes here and there, but
the core C lib is almost untouched (mainly HyperTable symbols stripping).

> High speed compression algorithm like BMDiff
> --------------------------------------------
>                 Key: HADOOP-5793
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5793
>             Project: Hadoop Common
>          Issue Type: New Feature
>            Reporter: elhoim gibor
>            Assignee: Michele (@pirroh) Catasta
>            Priority: Minor
> Add a high speed compression algorithm like BMDiff.
> It gives speeds ~100MB/s for writes and ~1000MB/s for reads, compressing 2.1billions
web pages from 45.1TB in 4.2TB
> Reference:
> http://norfolk.cs.washington.edu/htbin-post/unrestricted/colloq/details.cgi?id=437
> 2005 Jeff Dean talk about google architecture - around 46:00.
> http://feedblog.org/2008/10/12/google-bigtable-compression-zippy-and-bmdiff/
> http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=755678
> A reference implementation exists in HyperTable.

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