Tom Lane wrote:
>
> I was actually having second thoughts about the idea of using file
> locking. The only environment in which I've heard of file locks not
> being trustworthy is NFS, and if you're running a DB on NFS you've
> probably got worse problems than this one. Notably, if you mistakenly
> try to start postmasters on two different machines against the same
> NFS-mounted directory, the PID-based interlock will certainly fail, while
> file locking might save you. So maybe we should take another look at
> that. Has anyone heard of other contexts in which file locks don't
> work? Has Windows got them?
>
>
>
Yes. But they are mandatory rather than advisory, I believe.
cheers
andrew