Re: [ADMIN] Multiple backends on a single physical database

Anuradha Ratnaweera wrote:
> On Thu, Oct 10, 2002 at 10:09:55AM -0400, Bruce Momjian wrote:
> > Vincent Janelle wrote:
> > > No. Only one postmaster can access the PGDATA dir at one time.
> > > Attempting to run multiple copies will result in data corruption.
> >
> > We also don't recommend NFS directories because the NFS file behavior is
> > not 100% the same as a local file system.
>
> Obviously fsync(), WAL and NFS is not a good combination ;)
>
> As we are looking for possibilities to contribute to the postgresql
> code, I have couple of more questions.
>
> Is there any plans to,
> - Make postmaster a multithreaded application?

No, not really. The multi-process model seems to work fine, and though
we can imagine cases where having more than one thread for a session
would help (like in sorting) we are not sure it is worth the added
complexity. We already have other areas of easier optimization left to
improve.

> - Add more fault tolerence by better replication (yes. I have already
> looked at current replication efforts)?

Not really, just the replication projects and the multi-master
pgreplication at gborg.postgresql.org.

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