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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16296) Reverse scan performance degrades when using filter lists
Date Mon, 01 Aug 2016 19:50:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15402702#comment-15402702
] 

Andrew Purtell commented on HBASE-16296:
----------------------------------------

I applied Ted's change to master and ran all scanner and filter tests locally and they pass
except for TestPartialResultsFromClientSide, which fails anyway with REEs complaining about
socket timeout after region move (not good - separate issue). Checking branch-1 now.




> 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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