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- Newsgroups: comp.protocols.appletalk
- Path: sparky!uunet!news.mtholyoke.edu!jbotz
- From: jbotz@mtholyoke.edu (Jurgen Botz)
- Subject: Re: CAP6.1 and Publish and Subscribe
- Message-ID: <BtpwEx.GE8@mtholyoke.edu>
- Sender: news@mtholyoke.edu (USENET News System)
- Organization: Mount Holyoke College
- References: <SANDY.92Aug28130057@beeker.cs.umass.edu>
- Date: Fri, 28 Aug 1992 23:40:08 GMT
- Lines: 37
-
- In article <SANDY.92Aug28130057@beeker.cs.umass.edu> wise@cs.umass.edu writes:
- >We are running CAP6.1 on a DECstation 5000/Ultrix 4.2 and have
-
- CAP6.1? Last I checked the highest version was 6.0pl125.
-
- >found that edition files are unusable if placed on server volumes.
- >Attempting to subscribe to or view the edition results in an error.
- ~~~~~~~~
- What was the error? I just tried it, and I did _not_ get an error...
- rather, it failed silently. I.e., I managed to subscribe to an edition
- on a CAP volume, but the edition was empty. However, when I tried the
- same thing with both the publisher and the subscriber on the same
- machine (but the edition still on a CAP volume), it worked fine.
-
- This leads me to believe that the problem is with the fact that if
- the Publisher and Subscriber are on different systems, they are referring
- to the directory which contains the edition with different dirIDs.
-
- The failure of CAP to conform to the AFP requirement that dirIDs be
- constant and unique throughout the lifetime of the volume (filesystem)
- appears to be breaking several recent features of the Mac OS: definitely
- aliases, probably publish & subscribe. I would say it is time to rethink
- this functionality... anybody working on that already? I've browsed the
- code, and it sure isn't going to be trivial, no matter what scheme is
- used. I'm tempted actually to go ahead a simply use inodes, thereby
- complying with the "constant" requirement, but probably breaking the
- "unique throughout lifetime" requirement even more thoroughly. Still,
- I think this might not actually be so bad, since inodes are only re-used
- after a file is removed anyway, so the only time that the Mac should get
- a dirID that no longer points to the right directory is when the right
- directory no longer exists. Given that, what is the worst thing that
- can happen?
- --
- Jurgen Botz | Internet: JBotz@mtholyoke.edu
- Academic Systems Consultant | Bitnet: JBotz@mhc.bitnet
- Mount Holyoke College | Voice: (US) 413-538-2375 (daytime)
- South Hadley, MA, USA | Snail Mail: J. Botz, 01075-0629
-