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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6573) Distributed Three-Phase Commit framework.
Date Fri, 16 Nov 2012 18:44:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13499010#comment-13499010
] 

Jonathan Hsieh commented on HBASE-6573:
---------------------------------------

An update here -- I've been working on making this code significantly more straightforward,
and hopefully will be posting some patches related to this soon.

I'm going to post a few slides, explaining what the classes are, and how they are related
and used.  The first patch cut will be off of an old branch -- I'll port this to the snapshot
branch after I get the one of the online snapshot implementations working again.   At the
end of the day, this will have removed a few layers, most of the generics, and renamed/restructured
quite a bit.
                
> Distributed Three-Phase Commit framework.
> -----------------------------------------
>
>                 Key: HBASE-6573
>                 URL: https://issues.apache.org/jira/browse/HBASE-6573
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 0.96.0
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>             Fix For: hbase-6055
>
>         Attachments: java_HBASE-6573-v0.patch, Procedure coordination.pdf
>
>
> For HBASE-6055 (snapshots), we do two-phase commit in several places. This is a generally
useful paradigm for a distributed system.

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