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https://issues.apache.org/jira/browse/HBASE-18090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16256374#comment-16256374
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xinxin fan edited comment on HBASE-18090 at 11/17/17 2:37 AM:
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Thank you stack, i have add a release note. another thing, i notice that there
are many build fails recently, especially for branch-1 patch, here
https://builds.apache.org/job/PreCommit-HBASE-Build. any reason?
was (Author: xinxin fan):
Thank you @stack, i have add a release note. another thing, i notice that there
are many build fails recently, especially for branch-1 patch, here
https://builds.apache.org/job/PreCommit-HBASE-Build. any reason?
> 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
> Reporter: Mikhail Antonov
> Assignee: xinxin fan
> Fix For: 2.0.0-beta-1
>
> Attachments: HBASE-18090-V3-master.patch,
> HBASE-18090-V4-master.patch, HBASE-18090-V5-master.patch,
> HBASE-18090-branch-1-v2.patch, HBASE-18090-branch-1-v2.patch,
> HBASE-18090-branch-1.3-v1.patch, HBASE-18090-branch-1.3-v2.patch,
> HBASE-18090.branch-1.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.
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