MartinM

Quick question for the assembled brains on Scoobynet

Do twin CPU motherboards give you resilience as well as performance e.g. if one CPU breaks (overheats/just fatally fails) does the whole machine continue to run, or does it fall over in a big heap.

If it does carry on, how does it do it e.g what happens to the in-flight instructions that were in (or cached in) the processor immediately before it stopped? Surely there are/were important to some process or other and can't really be ignored

Edit: 666 posts. Eek

[Edited by MartinM - 10/1/2002 1:27:29 PM]

DominicA

I think it would stop.... unless it was a machine specifically designed to provide FT / redundancy... which probably doesn't exist anyway...

super_si

I was going to run a dual board on just 1 CPU till i could afford the 2nd, but if there running and one dies, i cannot answer

Si

dogmaul

normally they fall over in a rather large heap but you could have one that would carry on if one fails if you wanted to design one, i imagine that the likes of the cray super computers dont fall over if a cpu fails could be wrong tho. im just glad non of the cpu's have failed in my servers yet

David_Wallis

they normally crash if a cpu fails, if running nt you would then either do a few things...

1) On a compaq server run hal recovery mode..
2) Edit Boot.Ini and add /Onecpu
3) Replace the HAL

Oh and Prey!

David

dogmaul

but it depends on M/B most need a terinator card sat in the spare slot/socket to let it work