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- Path: sparky!uunet!sun-barr!ames!haven.umd.edu!darwin.sura.net!jvnc.net!yale.edu!ira.uka.de!fauern!fauna!cip.informatik.uni-erlangen.de!mskuhn
- From: mskuhn@cip.informatik.uni-erlangen.de (Markus Kuhn)
- Subject: X.500 (was: second system syndrome)
- References: <1992Aug26.154940.14823@sequent.com> <BtMtov.9xK@immd4.informatik.uni-erlangen.de> <id.ZIRS.GD@ferranti.com>
- Message-ID: <BtuI66.56H@immd4.informatik.uni-erlangen.de>
- Sender: news@immd4.informatik.uni-erlangen.de
- Organization: CSD., University of Erlangen
- Date: Mon, 31 Aug 1992 11:20:29 GMT
- Lines: 33
-
- peter@ferranti.com (peter da silva) writes:
-
- >Only if you have cheap real-time access to the database. X.400 and X.500 is
- >a solution for rich folks or service bureaus. It doesn't scale well to low
- >bandwidth loosely-coupled systems.
-
- I am especially interested in using X.400/X.500 over periodic dialup
- connections with slow lines (e.g. 9600bits/sec). If you can't bring the
- user to the database in realtime, then bring the database to the local system.
- If I see the huge traffic that is transported in the USENET every day from
- node to node in dialup systems, then it should be no problem to have a
- permanent copy of large portions of the directory information tree using
- the X.500(92) DISP (directory information shadowing protocol).
-
- It is not clearly specified in the standards, but I believe it is all right
- if you set up a network that consists of DSAs that only support the DISP
- instead of the usual DSP. Only a few DSAs in the net have to support
- also DSP, so that the rest of the world can ready their shadows.
-
- Comments?
-
- I am interested in implementing such a biest. The DISP protocol is really
- simple compared to DSP. I agree that X.400 is not much fun without a
- directory, but believe me, the X.400/X.500 combination (together with
- the X.gc stuff for NEWS) will be the prefered email system in a few years!
-
- Markus
-
- ---
- Markus Kuhn, Computer Science student -=-=- University of Erlangen, Germany
- Internet: mskuhn@immd4.informatik.uni-erlangen.de | X.500 entry available
- -A distributed system is one in which the failure of a computer you didn't-
- -even know existed can render your own computer unusable. (Leslie Lamport)-
-