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Ashu Pachauri commented on HBASE-18090: --------------------------------------- [~stack] sir I already reapplied the patch with correct commit message for master and branch-2. The above comments from Hudson are for the reapply (the update from incorrect patch and revert went to the different jira HBASE-18814 ). I am currently waiting on the patch for branch-1 from [~xinxin fan] before closing this issue. > Improve TableSnapshotInputFormat to allow more multiple mappers per region > -------------------------------------------------------------------------- > > Key: HBASE-18090 > URL: https://issues.apache.org/jira/browse/HBASE-18090 > Project: HBase > Issue Type: Improvement > Components: mapreduce > Affects Versions: 3.0.0 > Reporter: Mikhail Antonov > Assignee: xinxin fan > Fix For: 3.0.0, 2.0.0-alpha-4 > > Attachments: HBASE-18090-branch-1.3-v1.patch, > HBASE-18090-branch-1.3-v2.patch, HBASE-18090-V3-master.patch, > HBASE-18090-V4-master.patch, HBASE-18090-V5-master.patch > > > TableSnapshotInputFormat runs one map task per region in the table snapshot. > This places unnecessary restriction that the region layout of the original > table needs to take the processing resources available to MR job into > consideration. Allowing to run multiple mappers per region (assuming > reasonably even key distribution) would be useful. -- This message was sent by Atlassian JIRA (v6.4.14#64029)