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From "Himanshu Vashishtha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4210) Allow coprocessor to interact with batches per region sent from a client
Date Mon, 15 Apr 2013 15:38:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13631801#comment-13631801
] 

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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