hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
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 07:11:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14107905#comment-14107905
] 

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

And lastly, this obviously does not work when any block encoding is used as there is no offset
for a Cell, so the code is only for ScannerVx and not EncodedScannerVx.


> 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.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message