<Allison Parent is probably correct that Ultrix doesn't have as impressive
<a record of robustness as VMS, but there are certainly application-specifi
<cases where the system did pretty well. The collection of MicroVAX II part
<I have at home mostly used to be the University of Toronto's backbone IP
<routers, which ran an early Ultrix (I forget if it was 2.0 or 3.0).
True enough. I've found it more solid than the also rans even on PCs but
compared to VMS it was more difficult to maintain and less tolerent of
faults. VMS was more tolerent of memory page faults(ram parity hits) and
seemed to have less trouble with unplanned/undesired shutdowns.
I suspect for one reason that was true... VMS was older and had more
emphasis so there was maturity plus development effort.
On the other hand I've seen UNIX pdp-11s run as long as power and hardware
was available.
Allison
Received on Wed Jan 27 1999 - 17:57:03 GMT