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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-14418) Make better SEEK vs SKIP decision with seek hints.
Date Sat, 12 Sep 2015 05:15:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14741902#comment-14741902
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Lars Hofhansl edited comment on HBASE-14418 at 9/12/15 5:15 AM:
----------------------------------------------------------------

0.98 version. In my tests with Phoenix I did not see noticeable improvement, though. So might
just close. Doing some more test until then.

(turns out in my schema Phoenix would not use SKIP_SCANs)


was (Author: lhofhansl):
0.98 version. In my tests with Phoenix I did not see noticeable improvement, though. So might
just close. Doing some more test until then.

> Make better SEEK vs SKIP decision with seek hints.
> --------------------------------------------------
>
>                 Key: HBASE-14418
>                 URL: https://issues.apache.org/jira/browse/HBASE-14418
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Lars Hofhansl
>             Fix For: 2.0.0, 1.0.1, 1.1.0, 0.98.12
>
>         Attachments: 13109.txt, 14418-0.98.txt
>
>
> Continuation of parent.
> We can also do this optimization for seek hints. This would allow filters and coprocessors
to be more liberal with seek hints, as seeking when unnecessary is less of perf detriment.
> It's not quite as clear cut, since in order to check, we actually do need to create the
seek hint Cell. Then when we actually seek, we need to create it again. Need to test carefully.



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