[Linux-cluster] Attn Patrick.

Benjamin Marzinski bmarzins at redhat.com
Fri Dec 2 23:16:45 UTC 2005

On Mon, Nov 28, 2005 at 11:09:45PM +0800, James Davis wrote:
> Hi Patrick,
>            I'm hoping you can explain to me, and if I have the right idea 
> about GFS/GNBD
> I'm referring to this document http://gfs.wikidev.net/GNBD_installation for 
> the purposes of config
> What I'm trying to do is setup GNBD on 2 machines.. I'm wondering if its 
> possible for the two mahines to cluster the data on the local hdd's rather 
> than using an external storage array..

No. Not without cluster aware mirror software, which isn't available just yet.
Otherwise, you run into the problem where If a node crashes, it might have
written to one device and not the other. So your mirror can be out of sync,
and the other machine will never know.

> i.e machine raid0. basically replicated volumes...
> Also if this IS possible, am I right in assuming if one machine goes down 
> the second one will take over the primaries role...
> On the client machine how do you set it to connect to the cluster?
> The documentation seems to be very lacking and I'm somewhat stressed out 
> from work wondering if what I'm trying to do is possible?
> If you need more clarification on what I'm trying to do please ask.
> Sorry if this comes across as newbish
> Regards
> James 
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