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https://issues.apache.org/jira/browse/HBASE-6339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13408695#comment-13408695
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Zhihong Ted Yu commented on HBASE-6339:
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In many production systems, region splitting is effectively disabled.
Looks like there is some in gem in your initial proposal if we can reliably
detect that there is no region splitting.
> Bulkload call to RS should begin holding write lock only after the file has
> been transferred
> --------------------------------------------------------------------------------------------
>
> Key: HBASE-6339
> URL: https://issues.apache.org/jira/browse/HBASE-6339
> Project: HBase
> Issue Type: Improvement
> Components: client, regionserver
> Affects Versions: 0.90.0
> Reporter: Harsh J
> Assignee: Harsh J
>
> I noticed that right now, under a bulkLoadHFiles call to an RS, we grab the
> HRegion write lock as soon as we determine that it is a multi-family bulk
> load we'll be attempting. The file copy from the caller's source FS is done
> after holding the lock.
> This doesn't seem right. For instance, we had a recent use-case where the
> bulk load running cluster is a separate HDFS instance/cluster than the one
> that runs HBase and the transfers between these FSes can get slower than an
> intra-cluster transfer. Hence I think we should begin to hold the write lock
> only after we've got a successful destinationFS copy of the requested file,
> and thereby allow more write throughput to pass.
> Does this sound reasonable to do?
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