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https://issues.apache.org/jira/browse/HBASE-11811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14108441#comment-14108441
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Andrew Purtell commented on HBASE-11811:
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Interesting. We should take this for a spin on a small cluster with YCSB. 

bq. also makes block seeking identical between HFileReaderV2 and HFileReaderV3.

We should clean that up in any case. 

> 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: 11811-wip-v2.txt, 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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