Well, the DCE UUID algorithm uses the NIC's MAC address, which is independent of the host name; host names tend to change, MAC addresses tend not to. The UUID algorithm also includes a guard against backward-moving clocks. -- Alexander Staubo http://www.mop.no/~alex/ "`Ford, you're turning into a penguin. Stop it.'" --Douglas Adams, _The Hitchhiker's Guide to the Galaxy_

-----Original Message----- From: Jim Fulton [mailto:jim@digicool.com] Sent: 22. juli 1999 15:22 To: Alexander Staubo Cc: Zope Mailing List (E-mail); 'Rob Page' Subject: Re: [Zope] Upgrading Zclasses

Alexander Staubo wrote:

...

Sounds like UUIDS or GUIDs would have been an even better

identification

...

scheme.

The algorithm used by ZClasses is very similar to that used in other GUID schemes. The algorithm uses a hash of location (ZClass URL) and time. I think that the probability of collisions is similar between the ZClass alogorithm and other schemes and the ZClass algorithm is alot simpler.

Jim

-- Jim Fulton mailto:jim@digicool.com Python Powered! Technical Director (888) 344-4332 http://www.python.org Digital Creations http://www.digicool.com http://www.zope.org

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