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https://issues.apache.org/jira/browse/HBASE-20056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16380663#comment-16380663
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Hudson commented on HBASE-20056:
--------------------------------
SUCCESS: Integrated in Jenkins build HBase-1.2-IT #1076 (See
[https://builds.apache.org/job/HBase-1.2-IT/1076/])
HBASE-20056 Performance optimization on (tedyu: rev
c0e82bef016d0e4d0fe06320cc860a4c2737be1c)
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableInputFormatBase.java
> Performance optimization on MultiTableInputFormatBase#getSplits()
> ------------------------------------------------------------------
>
> Key: HBASE-20056
> URL: https://issues.apache.org/jira/browse/HBASE-20056
> Project: HBase
> Issue Type: Bug
> Components: hbase, mapreduce
> Affects Versions: 1.0.1, 1.3.1, 1.2.6
> Reporter: ShivaKumar SS
> Assignee: Yechao Chen
> Priority: Minor
> Labels: hbase, mapreduce, performance
> Fix For: 1.2.7
>
> Attachments: HBASE-20056.branch-1.2.patch
>
>
> Currently this method iterates the List of scan objects to get splits and for
> each iteration it opens the HConnection object and closes it, which is heavy.
> It can be optimized such that a single Hconnection can be used to compute all
> the splits of for all the scan objects for their splits computation.
> This optimization will help in reducing the launch time for MR Job.
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