"Oscar Serrano" <oserra@fondos.net> writes:
> But with postgres... ugh! here is a big problem. I've tried to start two
> postgres, one in each Linux, and both having the PGDATA directory in the
> RAID. Both postgres start correctly, but the changes one postgres does, are
> not noticed by the second one.
This will not work; don't even think of trying it, unless you want to
corrupt your database beyond repair.
Postgres depends on shared-memory communication among backends, not only
on disk files, so there is no chance of making this work.
regards, tom lane