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- Newsgroups: comp.protocols.iso
- Path: sparky!uunet!math.fu-berlin.de!fauern!fauna!cip.informatik.uni-erlangen.de!mskuhn
- From: mskuhn@cip.informatik.uni-erlangen.de (Markus Kuhn)
- Subject: Re: X.500 (was: second system syndrome)
- References: <BtMtov.9xK@immd4.informatik.uni-erlangen.de> <id.ZIRS.GD@ferranti.com> <BtuI66.56H@immd4.informatik.uni-erlangen.de> <id.PPVS.LD3@ferranti.com>
- Message-ID: <Bu0BKI.6uL@immd4.informatik.uni-erlangen.de>
- Sender: news@immd4.informatik.uni-erlangen.de
- Organization: CSD., University of Erlangen
- Date: Thu, 3 Sep 1992 14:43:30 GMT
- Lines: 24
-
- peter@ferranti.com (peter da silva) writes:
-
- >In article <BtuI66.56H@immd4.informatik.uni-erlangen.de> mskuhn@cip.informatik.uni-erlangen.de (Markus Kuhn) writes:
- >> 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.
-
- >Well, that sounds like a lot of volume.
-
- I estimate that every user will need about 300-500 bytes in the database
- if you replicate only the most important attributes (i.e. no photos etc.).
- I.e. you get about 3 million entries on a gigabyte disk. An initial download
- of this database should need about a day on a LZW compressed ISDN B-
- channel. The update traffic may be perhaps 1/1000 of the whole database
- per week. This isn't perhaps unaffordable with tomorrows PCs ...
- Of course the initial download must be possible in several steps!
-
- 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)-
-