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

[Jeff Wasilko]

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?

We're doing that under Solaris right now with the stock volume manager
(that also does raid-1 internally).

-j