However, I do not think the client is available in newer versions for this particular platform/OS.
Correct me if I'm wrong.
It's a Tandem with NonStop-UX 4.0
(B32IPM50 CM-1475 MIPS/R4400)
Obviously not a PC.
Because of the poor performance of the machine, I wish to place the actual database on another machine (pc-linux/sun-solaris/etc.) but still need backwards compatibility for the old client to access it.
Sorry Tomas - not familar with the OS - I hadn't realised that you db and client s/ware were on the same m/c. I assumed that you had a seperate client m/c.
If you can create/update the vnode in the ingres client then you should be able to point that at another m/c (OS independant). How you do that on this OS - don't know I'm afraid. You could try www.ca.com, if you haven't already.
Sounds like you want to move the database to a newer box and version, as long as you don't use any new features I am pretty sure I have in the past connected through Ingres net to a database on a newer version of Ingres in the past. We migrated data this way a lot.
Read the sections on netu and Ingres net in the manuals. They should give you a starting point.