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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15243) Utilize the lowest seek value when all Filters in MUST_PASS_ONE FilterList return SEEK_NEXT_USING_HINT
Date Tue, 08 Mar 2016 08:53:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15184680#comment-15184680
] 

Hudson commented on HBASE-15243:
--------------------------------

FAILURE: Integrated in HBase-1.4 #6 (See [https://builds.apache.org/job/HBase-1.4/6/])
HBASE-15243 Utilize the lowest seek value when all Filters in (tedyu: rev 4ec6ad12c9199ab39b5650aa62cece31672f838f)
* hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterList.java
* hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterListOrOperatorWithBlkCnt.java


> Utilize the lowest seek value when all Filters in MUST_PASS_ONE FilterList return SEEK_NEXT_USING_HINT
> ------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-15243
>                 URL: https://issues.apache.org/jira/browse/HBASE-15243
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.4.0
>
>         Attachments: HBASE-15243-v1.txt, HBASE-15243-v2.txt, HBASE-15243-v3.txt, HBASE-15243-v4.txt,
HBASE-15243-v5.txt, HBASE-15243-v6.txt, HBASE-15243-v7.txt
>
>
> As Preston Koprivica pointed out at the tail of HBASE-4394, when all filters in a MUST_PASS_ONE
FilterList return a SEEK_USING_NEXT_HINT code, we should return SEEK_NEXT_USING_HINT from
the FilterList to utilize the lowest seek value.
> This would save unnecessary accesses to blocks which are not in scan result.
> A unit test has been added which shows the reduction in the number of blocks accessed
when this optimization takes effect.



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