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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16296) Reverse scan performance degrades when scanner cache size matches page filter size
Date Fri, 29 Jul 2016 00:17:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15398485#comment-15398485
] 

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

SUCCESS: Integrated in Phoenix-master #1346 (See [https://builds.apache.org/job/Phoenix-master/1346/])
PHOENIX-3121 Mention dependency on HBASE-16296 (samarth: rev cb21c8175534fc15f0d3934e7dd24754475c0735)
* phoenix-core/src/main/java/org/apache/phoenix/execute/BaseQueryPlan.java


> 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: 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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