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https://issues.apache.org/jira/browse/HBASE-3996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13233908#comment-13233908
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Zhihong Yu commented on HBASE-3996:
-----------------------------------
I ran TestMultiTableInputFormat on patch v4 on MacBook and it passed.
{code}
Running org.apache.hadoop.hbase.mapreduce.TestMultiTableInputFormat
Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 447.396 sec
Results :
Tests run: 5, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO] --- maven-surefire-plugin:2.10:test (secondPartTestsExecution) @ hbase
---
[INFO] Tests are skipped.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7:38.220s
{code}
Please provide comment about this feature here or on
https://reviews.apache.org/r/4411/
> 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
> Assignee: Eran Kutner
> Fix For: 0.94.0, 0.96.0
>
> Attachments: 3996-v2.txt, 3996-v3.txt, 3996-v4.txt, HBase-3996.patch
>
>
> 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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