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From Andrew Purtell <apurt...@apache.org>
Subject Re: [VOTE] Merge HDFS-3077 (QuorumJournalManager) branch to trunk
Date Thu, 27 Sep 2012 09:11:13 GMT
I don't follow. For example the QJM and HA NameNode configuration are
designed together to eliminate the SPOF in HDFS, within HDFS. I don't see
how they make sense separately.

On Thursday, September 27, 2012, Konstantin Shvachko wrote:

> The SPOF is in HDFS. This project is about shared storage
> implementation, that could be replaced by NFS or BookKeeper or
> something else.
> Suppose failure happened because NFS failed. Where do you go? NetApp.
> Same if QJ failed. You go to the creators, which will be somewhat
> closer than NetApp, because it is still Hadoop.
>
> --Konst
>
> On Thu, Sep 27, 2012 at 12:50 AM, Stack <stack@duboce.net <javascript:;>>
> wrote:
> > On Wed, Sep 26, 2012 at 4:21 PM, Konstantin Shvachko
> > <shv.hadoop@gmail.com <javascript:;>> wrote:
> >> Don't understand your argument. Else where?
> >
> > You suggest users should download HDFS and then go to another project
> > (or subproject) -- i.e. 'elsewhere' -- to get a fundamental, a fix for
> > the SPOF.  IMO, the SPOF-fix belongs in HDFS core.
> >
> > St.Ack
>


-- 
Best regards,

   - Andy

Problems worthy of attack prove their worth by hitting back. - Piet Hein
(via Tom White)

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