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https://issues.apache.org/jira/browse/HBASE-2001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12933068#action_12933068
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HBase Review Board commented on HBASE-2001:
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Message from: "Andrew Purtell" <apurt...@apache.org>
bq. On 2010-11-15 16:51:18, stack wrote:
bq. > +1 on commit to TRUNK. I think all below can be cleaned up on commit
(Andrew, you going to commit?)
Stack, Yes I plan to commit the patches for HBASE-2001/HBASE-2002/HBASE-2321
onto trunk this week. The dynamic RPC and coprocessor framework changes are
largely independent and will go in separately to make the change history in the
commit log more informative. We will address your comments before doing so.
- Andrew
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> Coprocessors: Colocate user code with regions
> ---------------------------------------------
>
> Key: HBASE-2001
> URL: https://issues.apache.org/jira/browse/HBASE-2001
> Project: HBase
> Issue Type: Sub-task
> Reporter: Andrew Purtell
> Assignee: Mingjie Lai
> Fix For: 0.92.0
>
> Attachments: asm-transformations.pdf,
> HBASE-2001-RegionObserver-2.patch, HBASE-2001-RegionObserver.patch,
> HBASE-2001.patch.gz, packge-info.html, packge-info.html, packge-info.html
>
>
> Support user code that runs run next to each region in table. As regions
> split and move, coprocessor code should automatically move also.
> Use classloader which looks on HDFS.
> Associate a list of classes to load with each table. Put this in HRI so it
> inherits from table but can be changed on a per region basis (so then those
> region specific changes can inherited by daughters).
> Not completely arbitrary code, should require implementation of an interface
> with callbacks for:
> * Open
> * Close
> * Split
> * Compact
> * (Multi)get and scanner next()
> * (Multi)put
> * (Multi)delete
> Add method to HTableInterface for invoking coprocessor methods and retrieving
> results.
> Add methods in o.a.h.h.regionserver or subpackage which implement convenience
> functions for coprocessor methods and consistent/controlled access to
> internals: store access, threading, persistent and ephemeral state, scratch
> storage, etc.
> GitHub: https://github.com/trendmicro/hbase/tree/coprocessor
> Please see the latest attached package-info.html for updated description.
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