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From "Jim Kellerman (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-669) MultiRegion transactions with Optimistic Concurrency Control
Date Mon, 18 Aug 2008 16:23:45 GMT

    [ https://issues.apache.org/jira/browse/HBASE-669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12623396#action_12623396

Jim Kellerman commented on HBASE-669:

> Clint Morgan - 17/Aug/08 12:18 PM
> Attaching current version: a few fixes, documentation, and cleanup.
> I think this is ready for commit. The main remaining issue is correctly recovering from
the HLog in event
> of crash.

How would this recovery be different from HBASE-728 combined with HBASE-698 ?

> MultiRegion transactions with Optimistic Concurrency Control
> ------------------------------------------------------------
>                 Key: HBASE-669
>                 URL: https://issues.apache.org/jira/browse/HBASE-669
>             Project: Hadoop HBase
>          Issue Type: New Feature
>          Components: client, ipc, regionserver
>            Reporter: Clint Morgan
>            Assignee: Clint Morgan
>             Fix For: 0.3.0
>         Attachments: hbase-669-v2.patch, hbase-669-v3.patch, hbase-669-v4.patch, hbase-669-v5.patch,
hbase-669.patch, hbase-669.patch, hbase-669.patch
> We have a need for ACID transactions across tables. This issue is about adding transactions
which span multiple regions.  We do not envision many competing writes, and will be read-dominated
in general. This makes Optimistic Concurrency Control (OCC) seem like the way to go.

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