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https://issues.apache.org/jira/browse/HBASE-1892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12836903#action_12836903
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stack commented on HBASE-1892:
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One hump that is in the way of faster splitting is that we do a flush while the
close flag is up. On a loaded hdfs just now, I saw that this flush took 10
seconds to write out an hfile of 40M which ain't the worst but during this ten
seconds, the close flag on the region was up and so any one trying to write
this region -- and probably read was barred access and probably off wandering
in the wilderness looking for where the region now resides.
> [performance] make hbase splits run faster
> ------------------------------------------
>
> Key: HBASE-1892
> URL: https://issues.apache.org/jira/browse/HBASE-1892
> Project: Hadoop HBase
> Issue Type: Improvement
> Reporter: stack
> Fix For: 0.21.0
>
> Attachments: HBASE-1892.patch
>
>
> hbase-1506 tried and failed making splits faster in 0.20 context. This issue
> is about doing it in 0.21 where we'll have to tools to do.
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