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From "Mikhail Bautin (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5469) Add baseline compression efficiency to DataBlockEncodingTool
Date Fri, 23 Mar 2012 22:05:30 GMT

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

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

    Attachment: jira-HBASE-5469-Add-baseline-compression-efficiency--2012-03-23_15_04_41.patch

The exact patch that was committed.
                
> 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, D2409.2.patch, jira-HBASE-5469-Add-baseline-compression-efficiency--2012-03-23_15_04_41.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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