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.
-- Mark Lewis