[CentOS] md raid 10
John R Pierce
pierce at hogranch.com
Thu Mar 8 14:38:02 EST 2012
On 03/08/12 6:33 AM, m.roth at 5-cent.us wrote:
>> > ok, so 3 x 48/64 core servers uses the same power as 6 x 4/8 core ?
>> > thats still major win.
> Um, no - that's what I'm saying is*not* the case. The new suckers drink
> power - using a UPS that I could hang, say, 6 Dell 1950's off of,*if* I'm
> lucky, I can put three of the new servers. And at that, if a big jobs
> running (they very much vary in how much power they draw, depending on
> usage), even with only three on, I've seen the leds run up to where
> they're blinking, indicating it's near overload, over 90% capability.
ok, how do you figure 3 48 core modern servers are not more powerful
computationally than 6 8 core servers? the 1950's were "cloverton"
which were dual core2duo chips, 2 sockets, at ~ 2-3GHz, for your 8 cores
now, I dunno what your 48 core servers are, if thats really 2x12 cores
with 'hyperthreading', then those extra threads are NOT good for intense
numerical compute work as they share the FPU, but even those 24 cores
should be faster than twice as many 8 core systems.
john r pierce N 37, W 122
santa cruz ca mid-left coast
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