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From "Mikhail Bautin (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5469) Add baseline compression efficiency to DataBlockEncodingTool
Date Wed, 21 Mar 2012 23:46:22 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5469?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mikhail Bautin updated HBASE-5469:
----------------------------------

    Status: Patch Available  (was: Open)
    
> Add baseline compression efficiency to DataBlockEncodingTool
> ------------------------------------------------------------
>
>                 Key: HBASE-5469
>                 URL: https://issues.apache.org/jira/browse/HBASE-5469
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Mikhail Bautin
>            Assignee: Mikhail Bautin
>            Priority: Minor
>         Attachments: D2409.1.patch
>
>
> DataBlockEncodingTool currently does not provide baseline compression efficiency, e.g.
Hadoop compression codec applied to unencoded data. E.g. if we are using LZO to compress blocks,
we would like to have the following columns in the report (possibly as percentages of raw
data size).
> Baseline K+V in blockcache  |   Baseline K + V on disk  (LZO compressed)  | K + V  DataBlockEncoded
in block cache |   K + V DataBlockEncoded + LZOCompressed (on disk)
> Background: we never store compressed blocks in cache, but we always store encoded data
blocks in cache if data block encoding is enabled for the column family.

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