Can FAH support multiple CPUs

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SuperCookie78
Posts: 2
Joined: Thu Oct 15, 2015 11:25 pm

Can FAH support multiple CPUs

Post by SuperCookie78 »

I do not mean cores i mean physical cpus. For example will FAH support two intel xeons and use both of them? or is FAH limited to a single cpu?
Kebast
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Re: Can FAH support multiple CPUs

Post by Kebast »

Multiples work just fine. I've got 3 old xeon based machines with two CPUs each (8 cores).
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SuperCookie78
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Re: Can FAH support multiple CPUs

Post by SuperCookie78 »

thank you
Nathan_P
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Re: Can FAH support multiple CPUs

Post by Nathan_P »

SuperCookie78 wrote:I do not mean cores i mean physical cpus. For example will FAH support two intel xeons and use both of them? or is FAH limited to a single cpu?
It does support multiple cpu's, back in the day the PPD king was a 4 processor machine. Not sure what the upper limit is but I know it scaled up to 8 processors without issue, these were only hex cores though so 48 threads. there were posts a long time ago referencing a 128 thread machine but I think they hit issues due to the number of threads.
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bruce
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Re: Can FAH support multiple CPUs

Post by bruce »

Nathan_P wrote:there were posts a long time ago referencing a 128 thread machine but I think they hit issues due to the number of threads.
The issue I remember was closely related to the number of atoms in the protein being folded. Small proteins cannot fold on high-cpu-count machines; only large proteins. I think the proteins of that day were large enough for 48 but not large enough for 128.

The GPU FahCore_21 is currently being developed to handle proteins on GPUs that are even larger than were ever possible on CPUs. I don't expect software to be developed to run those proteins on CPUs. (Apparently that development has encountered many of the same issues.)
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