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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11811) Use binary search for seeking into a block
Date Sat, 23 Aug 2014 07:07:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14107903#comment-14107903
] 

Lars Hofhansl commented on HBASE-11811:
---------------------------------------

I also just renamed the old blockSeek methods to blockSeekOld, obviously those would be removed.

Looking through the code I noticed a lot of duplication betweek HFileReaderV2 and HFileReaderV3,
this can probably factored a bit nicer generally.

> Use binary search for seeking into a block
> ------------------------------------------
>
>                 Key: HBASE-11811
>                 URL: https://issues.apache.org/jira/browse/HBASE-11811
>             Project: HBase
>          Issue Type: Brainstorming
>            Reporter: Lars Hofhansl
>         Attachments: block_index-v2.txt
>
>
> Currently upon every seek (including Gets) we need to linearly look through the block
from the beginning until we find the Cell we are looking for.
> It should be possible to build a simple cache of offsets of Cells for each block as it
is loaded and then use binary search to find the Cell in question.



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