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https://issues.apache.org/jira/browse/HBASE-3996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13050616#comment-13050616
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Eran Kutner commented on HBASE-3996:
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Thanks for the feedback @stack !
Will take some time to get to it but I definitely will.
As for a patch, I actually used the 0.90.3 sources, not through svn, but I'll
try to make a patch out of it. Is it OK to create the patch against a branch or
do you want it for trunk?
> Support multiple tables and scanners as input to the mapper in map/reduce jobs
> ------------------------------------------------------------------------------
>
> Key: HBASE-3996
> URL: https://issues.apache.org/jira/browse/HBASE-3996
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce
> Reporter: Eran Kutner
> Fix For: 0.90.4
>
> Attachments: MultiTableInputCollection.java,
> MultiTableInputFormat.java, MultiTableInputFormatBase.java,
> TableMapReduceUtil.java, TableSplit.java
>
>
> It seems that in many cases feeding data from multiple tables or multiple
> scanners on a single table can save a lot of time when running map/reduce
> jobs.
> I propose a new MultiTableInputFormat class that would allow doing this.
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