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https://issues.apache.org/jira/browse/HBASE-12259?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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maxwellguo updated HBASE-12259:
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    Comment: was deleted

(was: why? [~stack] )

> Bring quorum based write ahead log into HBase
> ---------------------------------------------
>
>                 Key: HBASE-12259
>                 URL: https://issues.apache.org/jira/browse/HBASE-12259
>             Project: HBase
>          Issue Type: Improvement
>          Components: wal
>    Affects Versions: 2.0.0
>            Reporter: Elliott Clark
>            Priority: Major
>         Attachments: Architecture for HydraBase (5).pdf, 
> RaftProtocolImplementationDesignDoc.pdf
>
>
> HydraBase ( 
> https://code.facebook.com/posts/321111638043166/hydrabase-the-evolution-of-hbase-facebook/
>  ) Facebook's implementation of HBase with Raft for consensus will be going 
> open source shortly. We should pull in the parts of that fb-0.89 based 
> implementation, and offer it as a feature in whatever next major release is 
> next up. Right now the Hydrabase code base isn't ready to be released into 
> the wild; it should be ready soon ( for some definition of soon).
> Since Hydrabase is based upon 0.89 most of the code is not directly 
> applicable. So lots of work will probably need to be done in a feature branch 
> before a merge vote.
> Is this something that's wanted?
> Is there anything clean up that needs to be done before the log 
> implementation is able to be replaced like this?
> What's our story with upgrading to this? Are we ok with requiring down time ?



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