[MLUG] dual cpu and if one dies

[Fabien Tivolle]

Experience from a dual socket Athlon MP:
 If one CPU dies, with linux running using the 2 cores, the system will 
crash. (easy test, just stop a fan on one of the CPU.)

There is an hot swap cpu capability on linux but it is not the same 
thing as CPU fail-over.

Fabien


Vrej Melkonian a écrit :
> This is an email I sent before the crash
> ===========================
>
> If you have 2 cpus (not dual core but 2 distinct cpus)
> and at run time one of them dies, does the system
> recover or it is very likely to crash?
>
> I was having a discussion with someone and he was
> talking about grid computing in which you can program
> your system for redundency. If 1 machine dies, the
> rest continue and there is no data loss.
>
> I am very certain with a PC with 2 CPUs, it is simply
> not designed to continue to run. The OS would jam up.
>
> OS = Linux
> motherboard = all motherboards supporting 2 Xeon or
> some P4, Athlon, anything not older than 2 years.
>
> My friend is certain that all systems with 2 cpus or
> dual-core or quad-core are designed to recover and
> continue to run.
>
> I'm pretty certain he is wrong because I have never
> heard Intel announce anything like that about their
> dual-core or quads.
> I have no clue about multi cpu systems.
>
>
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