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https://issues.apache.org/jira/browse/HADOOP-11569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14338034#comment-14338034
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Hadoop QA commented on HADOOP-11569:
------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest 
attachment 
  
http://issues.apache.org/jira/secure/attachment/12698649/HADOOP-11569-004.patch
  against trunk revision 71385f9.

    {color:green}+1 @author{color}.  The patch does not contain any @author 
tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new 
or modified test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with 
eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new 
Findbugs (version 2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in 
hadoop-common-project/hadoop-common.

Test results: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/5782//testReport/
Console output: 
https://builds.apache.org/job/PreCommit-HADOOP-Build/5782//console

This message is automatically generated.

> Provide Merge API for MapFile to merge multiple similar MapFiles to one 
> MapFile
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-11569
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11569
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Vinayakumar B
>            Assignee: Vinayakumar B
>         Attachments: HADOOP-11569-001.patch, HADOOP-11569-002.patch, 
> HADOOP-11569-003.patch, HADOOP-11569-004.patch
>
>
> If there are multiple similar MapFiles of the same keyClass and value 
> classes, then these can be merged together to One MapFile to allow search 
> easier.
> Provide an API  similar to {{SequenceFile#merge()}}.
> Merging will be easy with the fact that MapFiles are already sorted.



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