Re: Creating a new database on a different file system

On Mon, 2025-03-17 at 14:33 -0400, Ron Johnson wrote:
> On Mon, Mar 17, 2025 at 11:18 AM Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> wrote:
> > On Mon, 2025-03-17 at 15:51 +0100, Luca Ferrari wrote:
> > > On Mon, Mar 17, 2025 at 3:49 PM Ian Dauncey <Ian(dot)Dauncey(at)bankzero(dot)co(dot)za> wrote:
> > > > We have created a few databases on the file system defined in the postgresql.conf,
> > > > but now I would like to create another database within the same cluster but on a
> > > > different file system.
> > > >
> > > > Is this possible and if so, how do we go about it.
> > >
> > > create a tablespace on the filesystem you want to use, and then create
> > > the database adding the `WITH TABLESPACE` clause.
> > > See <https://www.postgresql.org/docs/17/sql-createtablespace.html>
> >
> > That is an option, but I would recommend to create a new database cluster
> > on the new file system rather than creating a tablespace.
>
> That of course requires using another port, which can be tricky in a company that by
> default closes all firewall ports at the network switch level, and where you must
> enumerate every server/subnet ("Rejected. Subnet range too broad!") that needs access
> to the new port, it takes time for requests for new port openings to be approved
> ("Rejected. We don't recognize 5433!") and then implemented.
>
> Much easier to use a tablespace.

*shrug* Sure, there are entities that think that security and professionalism can be
measured in how difficult you are making everybody's life. If rules and regulations
are in the way of choosing the best solution, you have to go for the second best one.

Yours,
Laurenz Albe