vaf@Valinor.Stanford.EDU (Vince Fuller) (01/11/90)
I'm interested in hearing about experiences that others have had with
the performance of the two different DEC architectures. Ideally, I'd
like to know what folks feel about the pmax (DS3100) vs the microvax
3800 series, for overall system performance, not just CPU speed (the
DS3100 seems to win that one). In particular, how do the systems stack
up for heavily I/O bound processes? My impression from having a pmax on
my desk is that the RZ55 disk + SCSI combination is rather slow. How
does it compare to a microvax-3800 with RF71 + Qbus? We are considering
using these systems a) a big network server machine (domain service,
mail relaying, etc.) and b) as general purpose timesharing/development
machine. I'd like to get a feel for which architecture will give better
overall performance in each case.
Thanks,
--Vincegrr@cbmvax.commodore.com (George Robbins) (01/12/90)
In article <7062@lindy.Stanford.EDU> vaf@Valinor.Stanford.EDU writes: > ... My impression from having a pmax on > my desk is that the RZ55 disk + SCSI combination is rather slow. How > does it compare to a microvax-3800 with RF71 + Qbus? We are considering > using these systems a) a big network server machine (domain service, > mail relaying, etc.) and b) as general purpose timesharing/development > machine. I'd like to get a feel for which architecture will give better > overall performance in each case. Don't forget the 5400 - I can't see that any of the microVAX systems, with the exception of something like the 3540 would be competative in terms of performance. Admittedly, I'm just guessing, but it's certainly worth some consideration since the 5400 has similar I/O and expansion the the high end microVAXEN and unless DEC botched something, the CPU performance should make it pretty quick. -- George Robbins - now working for, uucp: {uunet|pyramid|rutgers}!cbmvax!grr but no way officially representing arpa: cbmvax!grr@uunet.uu.net Commodore, Engineering Department fone: 215-431-9255 (only by moonlite)