🚀 go-pugleaf

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)-