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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-11569) Provide Merge API for MapFile to merge multiple similar MapFiles to one MapFile
Date Fri, 13 Feb 2015 06:13:12 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-11569?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinayakumar B updated HADOOP-11569:
-----------------------------------
    Attachment: HADOOP-11569-004.patch

Thanks [~umamaheswararao]
Attached the patch with comments fixed.

For close(), I was just trying to make similar to Reader and Writer.
I guess there is no necessary of public close(). so made it private.

> 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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