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xinxin fan edited comment on HBASE-18090 at 9/13/17 3:19 AM: ------------------------------------------------------------- [~ted_yu] [~mantonov] I have create a patch for master and put it on review board:) : https://reviews.apache.org/r/62267/ was (Author: xinxin fan): mantonov Mikhail Antonov I have create a patch for master and put it on review board : https://reviews.apache.org/r/62267/ > 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: 1.4.0 > Reporter: Mikhail Antonov > Assignee: xinxin fan > Attachments: HBASE-18090-branch-1.3-v1.patch, > HBASE-18090-branch-1.3-v2.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)