Re: [HACKERS] Patch for UUID datatype (beta)

mark@mark.mielke.cc wrote:
> On Tue, Sep 19, 2006 at 08:20:13AM -0500, Jim C. Nasby wrote:
> > On Mon, Sep 18, 2006 at 07:45:07PM -0400, mark@mark.mielke.cc wrote:
> > > I would not use a 100% random number generator for a UUID value as was
> > > suggested. I prefer inserting the MAC address and the time, to at
> > > least allow me to control if a collision is possible. This is not easy
> > > to do using a few lines of C code. I'd rather have a UUID type in core
> > > with no generation routine, than no UUID type in core because the code
> > > is too complicated to maintain, or not portable enough.
> > As others have mentioned, using MAC address doesn't remove the
> > possibility of a collision.
>
> It does, as I control the MAC address.

What happens if you have two postmaster running on the same machine?

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Alvaro Herrera                                http://www.CommandPrompt.com/
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