[Info-vax] Oracle Database vs Oracle/Rdb

[Hein RMS van den Heuvel]

On Tuesday, June 18, 2019 at 11:51:13 AM UTC-4, DTL wrote:
> Hi,
> a) has anyone here faced an Rdb/OpenVMS-IA64 to Oracle Database migration in a real time environment driven by Integrity Servers, please?
> b) Should the Customer worry about response time?
> Thanks.

Folks... FOCUS. Look at the original question once more! (Hi Didier!)

How come this discussion is now all about RMS???

I know... some things, some folks, never chance. 
Neil started this time with a gratuitous and incorrect comment:
 "Recall that RDB was developed by DEC as a successor to RMS. ".  
If anything RDB was developed as a next step from the RDBMS Codasyl database when the relation model and notably 'SQL' became relevant in the late 70's  (Ted Codd, Chris Date,...). 
It was never meant to replace to follow up on RMS. 
It never had native language support like Codasyl (in Cobol) and RMS.

Anyway, it is best to probe for the reasons to move a little more.

If the reason is 'access' then please consider that RDB offers ODBC and OCI API's and to a large degree can be indistinguishable from Oracle-Oracle when called from the outside so to speak.

If the reason is local production support, maintenance, backup, recovery, training, well that may indeed be harder and harder to come by. 
The RDB product is still great, and needs only minimal handholding, but who is around to admit to still know about it now, and who will be there in 5 years?

Surely it is easier to find (or train) 'regular' Oracle support and operational folks, but if/when they move why move to Oracle at all? Money to burn? 

If Oracle is somehow magically desirable/required then, as much as I care for OpenVMS, I would recommend moving to some Linux X64 platform.

>From a performance perspective, RDb on OpenVMS is probably, but not certainly, superior to Oracle-Oracle. They'll probably need more capacity (Memory, CPU) to run Oracle-Oracle with similar performance.

Good luck!