[comp.databases] Realtime Monitoring

jean@beno.CSS.GOV (Jean Anderson) (02/08/91)

I'm posting this for a friend who is drawing up specs for a tollgate
billing system.  Please send responses to me and I will forward them
to him.

Basically a vehicle drives through the gate and a barcode is scanned,
resulting in a charge to that account.  Each gate has a database and 
data is transferred to a central monitoring site.  All systems are 
connected via DECNET.

A big question is how "realtime" the monitoring capabilities could be.
For example, if an entry pops up on the monitor indicating that a
motorcycle just went through lane 1, the customer wants to look out 
the window, and verify that a motorcycle went through that gate, not
a 3 axle truck.

The initial thought is to implement the system on MicroVax 3100's
running ORACLE.

Now, I have a high regard for ORACLE, but I doubt that any system/database
at the MicroVax level could perform to the second like this. But then all 
my experience has been with semi-realtime systems.

Has anybody done this?  What combination of hardware/software could do it?


   -	Jean Anderson
	DBA, SAIC Geophysics Division
	jean@seismo.css.gov -or- jean@esosun.css.gov
	(619)458-2727


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            ++   Any opinions are mine, not my employer's. ++
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