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From "Mikhail Bautin (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5469) Add baseline compression efficiency to DataBlockEncodingTool
Date Thu, 23 Feb 2012 23:07:49 GMT
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

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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