VAX 6460 being slow, IO bottlenecks and SMP woes ...

From: Eric Smith <>
Date: Thu Mar 21 01:43:17 2002

> It wasn't. It does thing that today's desktops can't do. When is the
> last time you got 99.999% uptime out of a PC?

Not counting an eight-hour power failure, one of my PC-based servers
has had under two minutes of unscheduled downtime in seven years of
24x7 operation. That's better than 99.9999%.

Of course, it's not running Windows.

If I were running a mission-critical application, it would be easy
enough to outfit it with a backup generator so that even the whims
of PG&E wouldn't cause me grief. But the downtime due to PG&E
problems is certainly not the fault of the PC, and would have bit
me even if I'd been running a "real computer".

> Even though the
> theoretical bandwidth of the PCI bus was 120+ MB/sec systems rarely
> achieved > 1 - 2 MB/sec sustained throughput.

I don't know what systems those were, but my first 486 PCI system
routinely got sustained PCI throughput of over 15 MB/second, between
disk, ethernet, and display.

Even many ISA bus systems could sustain over 4 MB/second.
Received on Thu Mar 21 2002 - 01:43:17 GMT

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