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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-16296) Reverse scan performance degrades when using filter lists
Date Mon, 01 Aug 2016 21:11:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15402828#comment-15402828
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Andrew Purtell edited comment on HBASE-16296 at 8/1/16 9:10 PM:
----------------------------------------------------------------

I see the same TestPartialResultsFromClientSide glitch at head of branch-1 before application
of this patch, so I think that is environmental on my end and will circle back to it. Change
looks good. 


was (Author: apurtell):
I see the same TestPartialResultsFromClientSide glitch at head of branch-1 before application
of this patch, so I think that is environment on my end and will circle back to it. Change
looks good. 

> Reverse scan performance degrades when using filter lists
> ---------------------------------------------------------
>
>                 Key: HBASE-16296
>                 URL: https://issues.apache.org/jira/browse/HBASE-16296
>             Project: HBase
>          Issue Type: Bug
>          Components: Filters
>            Reporter: James Taylor
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.3.0, 1.4.0, 1.1.6, 0.98.21, 1.2.3
>
>         Attachments: 16296-MAYBE-v2.txt, 16296-MAYBE.txt, HBASE-16296.patch, PAgefilter.patch,
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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