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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-16296) Reverse scan performance degrades when scanner cache size matches page filter size
Date Sat, 30 Jul 2016 22:47:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15400645#comment-15400645
] 

Ted Yu edited comment on HBASE-16296 at 7/30/16 10:46 PM:
----------------------------------------------------------

Is there any case involving SkipFilter or whileMatchFilter which is not covered by existing
tests ?

I ran test suite against the above diff on branch-1 and all passed:
{code}
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:54 h
[INFO] Finished at: 2016-07-29T19:06:03-07:00
[INFO] Final Memory: 113M/3186M
{code}



was (Author: yuzhihong@gmail.com):
Is there any case involving SkipFilter or whileMatchFilter which is not covered by existing
tests ?

I ran test suite against the above diff on master branch and all passed:
{code}
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:54 h
[INFO] Finished at: 2016-07-29T19:06:03-07:00
[INFO] Final Memory: 113M/3186M
{code}


> Reverse scan performance degrades when scanner cache size matches page filter size
> ----------------------------------------------------------------------------------
>
>                 Key: HBASE-16296
>                 URL: https://issues.apache.org/jira/browse/HBASE-16296
>             Project: HBase
>          Issue Type: Bug
>            Reporter: James Taylor
>         Attachments: 16296-MAYBE.txt, generatedata-snippet.java, repro-snippet.java
>
>
> When a reverse scan is done, the server seems to not know it's done when the scanner
cache size matches the number of rows in a PageFilter. See PHOENIX-3121 for how this manifests
itself. We have a standalone, pure HBase API reproducer too that I'll attach (courtesy of
[~churromorales] and [~mujtabachohan]).



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