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From "Liyin Tang (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4469) Avoid top row seek by looking up ROWCOL bloomfilter
Date Fri, 21 Oct 2011 17:32:32 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4469?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Liyin Tang updated HBASE-4469:
------------------------------

    Summary: Avoid top row seek by looking up ROWCOL bloomfilter  (was: Avoid top row seek
by looking up bloomfilter)
    
> Avoid top row seek by looking up ROWCOL bloomfilter
> ---------------------------------------------------
>
>                 Key: HBASE-4469
>                 URL: https://issues.apache.org/jira/browse/HBASE-4469
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Liyin Tang
>            Assignee: Liyin Tang
>             Fix For: 0.94.0
>
>         Attachments: HBASE-4469_1.patch
>
>
> The problem is that when seeking for the row/col in the hfile, we will go to top of the
row in order to check for row delete marker (delete family). However, if the bloomfilter is
enabled for the column family, then if a delete family operation is done on a row, the row
is already being added to bloomfilter. We can take advantage of this factor to avoid seeking
to the top of row.

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