Re: Postgres and Ingres R3 / SAN

On Tue, Mar 07, 2006 at 11:20:50AM -0800, Mark Lewis wrote:
> On Tue, 2006-03-07 at 13:00 -0600, Jim C. Nasby wrote:
>
> ...
>
> > PostgreSQL on a SAN won't buy you what I think you think it will. It's
> > essentially impossible to safely run two PostgreSQL installs off the
> > same data files without destroying your data. What a SAN can buy you is
> > disk-level replication, but I've no experience with that.
>
> It is possible to run two instances against the same SAN using tools
> such as RedHat's Cluster Suite.  We use that in-house as a cheap
> alternative for Oracle clustering, although we're not using it for our
> PostgreSQL servers yet.  It's not for load balancing, just
> active/passive fault tolerance.

True, but the OP was talking about scaleability, which is not something
you get with this setup.
--
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461