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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16296) Reverse scan performance degrades when using filter lists
Date Tue, 02 Aug 2016 03:39:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15403303#comment-15403303
] 

Hudson commented on HBASE-16296:
--------------------------------

SUCCESS: Integrated in HBase-1.2-IT #567 (See [https://builds.apache.org/job/HBase-1.2-IT/567/])
HBASE-16296 Reverse scan performance degrades when using filter lists (apurtell: rev ead083f3b6f75b31bfead11bf24cfd2c896dcd32)
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java


> 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, 16296-ted-0.98.txt, HBASE-16296-0.98.patch,
HBASE-16296-0.98.patch, 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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