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Bryan Baugher commented on HBASE-3996: -------------------------------------- I believe there are two possible questions left unanswered as well as some +1's still needed, * The changes to TableSplit would not allow a new version of it to be deserialized by an old server. Is that OK for a M/R job? * It has been mentioned to scope this to scans (of a single table) rather then multiple tables. > 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: Bryan Baugher > Priority: Critical > Fix For: 0.96.0, 0.94.5 > > Attachments: 3996-v10.txt, 3996-v11.txt, 3996-v12.txt, 3996-v2.txt, > 3996-v3.txt, 3996-v4.txt, 3996-v5.txt, 3996-v6.txt, 3996-v7.txt, 3996-v8.txt, > 3996-v9.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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira