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https://issues.apache.org/jira/browse/HBASE-10126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13846089#comment-13846089
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Lars Hofhansl commented on HBASE-10126:
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The reason why my original patch didn't do that was that this relies on a
proper region split policy to be setup. Without that what it is in a region is
more or less random and atomic mutate is also slower as it cannot go in batches
as it manages to acquire the rowlocks but must acquire all row locks ahead of
time.
So making this the default is probably not a good idea.
> guarantee atomicity of multi-row mutation within a same region from a single
> HTable.batch
> -----------------------------------------------------------------------------------------
>
> Key: HBASE-10126
> URL: https://issues.apache.org/jira/browse/HBASE-10126
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Feng Honghua
> Assignee: Feng Honghua
> Attachments: HBASE-10126-0.94-v0.patch
>
>
> We use this improvement together with
> DelimitedKeyPrefixRegionSplitPolicy.java to implement local secondary index
> without the help of coprocessor.
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