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https://issues.apache.org/jira/browse/HADOOP-3152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585426#action_12585426
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Rong-En Fan commented on HADOOP-3152:
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New patch is attached with unit test. Please kindly review it. Thanks!
> Make index interval configuable when using MapFileOutputFormat for map-reduce
> job
> ---------------------------------------------------------------------------------
>
> Key: HADOOP-3152
> URL: https://issues.apache.org/jira/browse/HADOOP-3152
> Project: Hadoop Core
> Issue Type: Bug
> Components: io
> Affects Versions: 0.16.0
> Environment: ubuntu, 64bit, jdk1.6
> Reporter: Rong-En Fan
> Assignee: Doug Cutting
> Fix For: 0.17.0
>
> Attachments: mapfile.diff, mapfile.diff
>
>
> Per discussion with Doug Cutting on hadoop user mailing around Mar 21,
> thread title "MapFile and MapFileOutputFormat". Currently, there is no way
> to change the index interval for the output MapFile in a map-reduce job.
> As suggested, adding a static method MapFile(Configuration, int) to set the
> index interval and stores in Configuration, then MapFile.Writer constructor
> reads the setting from configuration may be a good idea.
> I also noticed that Hbase did similar things in HBASE-364.
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