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- Newsgroups: comp.os.vms
- Path: sparky!uunet!bcstec!silverm
- From: silverm@bcstec.ca.boeing.com (Jeff Silverman)
- Subject: Re: most stable VMS-system in the world.
- Message-ID: <C18s2x.JHn@bcstec.ca.boeing.com>
- Organization: Boeing Computer Services
- References: <1993Jan20.194832.12624@wega.rz.uni-ulm.de>
- Date: Fri, 22 Jan 1993 06:16:07 GMT
- Lines: 35
-
- ORAKEL@rzmain.rz.uni-ulm.de (Framstag) writes:
- >$ show system
- >VAX/VMS V5.5-1 on node MAIN02 20-JAN-1993 20:40:57.20 Uptime 6-NOV-1859 17:06:50
- > Pid Process Name State Pri I/O CPU Page flts Ph.Mem
- >21C00101 SWAPPER HIB 16 0 0 00:12:32.65 0 0
- >21C00902 OP_RAPP LEF 4 2221 0 00:00:28.50 11718 629
- >21C00106 CONFIGURE HIB 10 52 0 00:00:05.06 245 377
- >(...)
- >\ Ulli 'Framstag' Horlacher \ psi%(0262)45050260103::orakel \
- > \ Student consultant VAX/VMS and networks \ orakel@dulruu51.bitnet \
- > \ Rechenzentrum Universitaet Ulm Germany \ orakel@rz.uni-ulm.de \
- > \ "With mainframes you just can do nonsense, with PCs not even that." \
-
- Ulli,
- Doubtless busy with more pressing concerns, you missed a note or two
- about a feature of the Time of Year (TOY) clock on the VAX. The TOY clock
- is only 32 bits wide, but the VMS clock is 64 bits wide. When the VAX boots,
- it takes a good guess as to the system time and runs with it. The problem is
- most acute shortly after the new year. A novice system operator might simply
- change the time to be the correct time, which would give an uptime which is
- a negative number. Eventually, the number will become a small positive number.
- In VMS, small positive numbers are times in the 19th century.
- This is a very short explanation.
- The solution is to give the command SET TIME or SET TIME/CLUSTER
- every once in a while. We issue the command twice a day, which is overkill
- but then we run a metrology lab so we do weird things - once or twice a month
- is fine.
-
- Of course, if you keep your VAX up for about 120 years, nobody will
- notice.
-
- Best wishes,
-
- Jeff Silverman, Boeing Commercial Airplane
-
-