[Linux-cluster] software disk mirroring (raid-1) and cluster?

[Jeff Wasilko]

On Fri, Nov 16, 2007 at 09:56:48AM -0500, Jeff Wasilko wrote:
> On Mon, Nov 12, 2007 at 03:34:45PM -0500, Lon Hohberger wrote:
> > On Fri, 2007-11-09 at 13:00 -0500, Jeff Wasilko wrote:
> > > Hi:
> > > 
> > > We're considering moving an application from Solaris (and Sun's cluster 
> > > software) to Linux (and RHCS). The application (campus-wide mail) has 
> > > stringent data availability requirements, so currently we are doing 
> > > host-based mirroring between 2 totally separate hardware arrays.
> > > 
> > > Can I use the MD (multi-device) software to mirror under RHCS?
> > 
> > You can't use md from multiple nodes in a cluster in a sane way.  It
> > might work, but it'd be purely accidental.
> 
> Interesting. Even in a failover cluster where only one node has a filesystem
> mounted at a time?

And to clarify, our cluster would be using SAN storage that would
be failed over from node to node....

-j