[ https://issues.apache.org/jira/browse/HBASE-3996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-3996: ------------------------- Release Note: Adds MultiTableInputFormat. Usage example: {code} Scan scan1 = new Scan(); scan1.setStartRow(start1); scan1.setStopRow(end1); Scan scan2 = new Scan(); scan2.setStartRow(start2); scan2.setStopRow(end2); MultiTableInputCollection mtic = new MultiTableInputCollection(); mtic.Add(tableName1, scan1); mtic.Add(tableName2, scan2); TableMapReduceUtil.initTableMapperJob(mtic, TestTableMapper.class, Text.class, IntWritable.class, job1); {code} > 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: 0.94.5, 0.95.0 > > Attachments: 3996-0.94.txt, 3996-v10.txt, 3996-v11.txt, 3996-v12.txt, > 3996-v13.txt, 3996-v14.txt, 3996-v15.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