[Info-vax] Uptime for OpenVMS

[glen herrmannsfeldt]

Bill Gunshannon <billg999 at cs.uofs.edu> wrote:

(snip)
 
> But, all of this is, as usual, just plain silly.  The only thing needed
> to get a long uptime is "time".  I could easily build a system that did
> nothing and was backed up with emough power sources to guarantee it never
> went down.  Eventually, it would have some ridiculous uptime and it would
> have accomplished...   wait for it......  NOTHING.

For most, the disk has to keep running throughout.  For a diskless
client off an NFS server, even that isn't needed.  (Diskless NFS
clients survive a server reboot.)
 
> On another note, with all the VMing of systems today I wonder what would
> happen if I built  a system started it running, took a snapshot, shut it
> down and then restarted it from the snapshot (note, not reboot, restart)
> 10 years later?  Would it report an uptime of 10 years?

I have seen ones where the TOD clock stopped while it was suspended.

Then again, running BACKUP on a Win2K dual processor box reports
the time as twice the actual clock time.  (Presumably once for
each processor.)

-- glen