Mark Wendt (Contractor) wrote: > > Yah, force of habit with me I guess. I just don't like empty > spaces... Speaking of VMS being stable, I think we held the uptime > record here at NRL a few years back for a VAX 600 running VMS. Last > I knew it had an uptime of just a little over 9 years. Stability and > security were the key. That's why for years the stock exchanges were > powered by VMS. Leave it to DEC/HP/Compaq to let one of the best > OS's wither on the vine. Sorry for the OT:.. Just brings back > memories. Hmmm, wonder if there's an old NIST port of EMC for VMS? ;-) > > Yup, sad. VMS could have made a decent platform for EMC, too. But, Microvaxes were pretty slow, about 1000 times slower than even a mediocre Pentium today. That might be a problem. I think with just a little tweaking of some system parameters, and being careful with what system calls you used in the real-time code, you could have run EMC2 entirely in the normal VMS environment, without the restrictions of something like rtai. VMS was a decent real-time OS from the ground up, for the kind of real-time stuff we do with servo interface hardware. Never would have hacked it for software step generation, due to CPU speed.
The disk on my MicroVax finally died, but I kept it running from 1986 to 2007 - 20 YEARS! ~ 175,000 hours of up-time. At the end I had flaky backplane connectors, and had to reseat boards whenever it crashed to get it to boot back up. Otherwise, it just ran except for power failures. Jon ------------------------------------------------------------------------------ Register Now & Save for Velocity, the Web Performance & Operations Conference from O'Reilly Media. Velocity features a full day of expert-led, hands-on workshops and two days of sessions from industry leaders in dedicated Performance & Operations tracks. Use code vel09scf and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
