[comp.realtime] Real-time Databases

phils@cs.city.ac.uk (Phil M Sleat) (12/05/89)

I am doing a study into optimised architectures for real-time
database engines which may or may not use distributed techniques
and/or parallelism.

I would be very interested to hear from readers of this newsgroup, 
as to what they think the main characteristics of real-time database 
subsystems are. Do you have any experience in implementing real-time
databases ? What were the main requirements for the database function
of the system ?

In order to get a sensible frame of reference for this subject I
should explain what type of real-time system I'm considering. Large,
complex real-time control systems for example in chemical control 
plants; or C3 (command, control, and communications) systems in
naval vessels are my main area of interest. With the later, C3 systems
being my primary source of information. The most obvious
characteristics of the database function of these systems match the
general requirements for the whole system i.e. high performance, 
reliability, expandability, graceful degradation under hardware/software failure etc. What though are the specific characteristics of the 
database and DBMS and what makes them different from commercial 
non-real-time databases and DBMSs.

Any information would be greatly appreciated.


Phil M Sleat
JANET: phils@uk.ac.city.cs

andy@minster.york.ac.uk (11/09/90)

I am looking for references to real-time databases. In particular 
does anyone have details of any case studies?

Andy Wellings                     JANET:  andy@uk.ac.york.minster
Dept. of Computer Science         EARN:   andy@minster.york.ac.uk
University of York                UUNET:  ..!uunet!mcsun!ukc!minster!andy
York  YO1 5DD                     ARPA:   andy%york.minster@nsfnet-relay.ac.uk
ENGLAND
Tel. 0904 432742