"Jan Hartmann" <jhart(at)frw(dot)uva(dot)nl> writes:
> cluster consists of 45 nodes, all using a shared user file system. Is it
> possible to start up a postmaster on every node, using the same database?
No.
> The backend processes themselves would be completely autonomous, but they
> would have to share their data from the same source. To simplify things,
> only read-access is necessary.
In that case, make 45 copies of the database ...
regards, tom lane