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https://issues.apache.org/jira/browse/HBASE-4210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13631801#comment-13631801
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Himanshu Vashishtha commented on HBASE-4210:
--------------------------------------------
Anoop: I see you guys already discussed above that where do you need to put the
hooks for batchMutate. What I am trying to grok is why updateLock.readLock is
needed. This lock is a bit expensive one to hold as it used for ops like
flushes, and one can call any arbitrary code in the preXXX hook. Hope that
clarifies a bit :)
Btw, thanks for updating the release note.
> Allow coprocessor to interact with batches per region sent from a client
> ------------------------------------------------------------------------
>
> Key: HBASE-4210
> URL: https://issues.apache.org/jira/browse/HBASE-4210
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 0.94.6, 0.95.0
> Reporter: Lars Hofhansl
> Assignee: Anoop Sam John
> Fix For: 0.98.0, 0.94.6, 0.95.0
>
> Attachments: 4210_Trunk-V3.patch, HBASE-4210_94.patch,
> HBASE-4210_94-V2.patch, HBASE-4210_94-V3.patch, HBASE-4210_94-V4.patch,
> HBASE-4210_94-V5.patch, hbase-4210-addendum.patch, HBASE-4210_Trunk.patch,
> HBASE-4210_Trunk-V2.patch, HBASE-4210_Trunk-V3.patch
>
>
> Currently the coprocessor write hooks - {pre|post}{Put|Delete} - are strictly
> one row|cell operations.
> It might be a good idea to allow a coprocessor to deal with batches of puts
> and deletes as they arrive from the client.
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