Edward Ned Harvey wrote: >> From: Luke S Crawford [mailto:[email protected]] >> >> http://www.supermicro.com/Aplus/system/1U/1042/AS-1042G-TF.cfm >> > > Incidentally, Luke (or anyone else) ... Do you own any of these systems? I > guess I don't care if it's Supermicro, or any other brand. But the > supermicro link is here. > > As long as it's AMD processors. > > Would you be willing to actually measure the power draw of these systems? > I'll happily provide basic instructions to ensure the comparison is > apples-to-apples with my measurements. > > Personally, I think this should be done for every server, ever. I see too > often, that other admins overload UPS's or circuit breakers, or waste money > by overprovision cooling or UPS's. All of these are bad scenarios, and all > of them are easily avoidable for almost no cost, in terms of time or money. > > For the heck of it, here are my "basic instructions," that I think should > always be habitually completed. > > I use a kill-a-watt. When the server is new, I write a 3-line python > script, which is an infinite loop of random number generation. I launch as > many of these simultaneously as required, to fully max out all the CPU's. I > measure both the VA and W consumption of the server, and record it all in a > spreadsheet. I assume it's 120V, so you know the A by knowing the VA. I > keep track of which servers are plugged into which UPS, and how many A are > available in the circuit feeding the UPS. (I also measure the "charging" > current of the UPS.) I always fluff everything by about 20%. And I > estimate approx 3 BTU's cooling are required per W. > > Many times before, I have also maxed out the disk, memory, or network > utilization, and consistently find that the idle power consumption equals > the fully active power. It's only the CPU or GPU that seems to vary the > power consumption of the box significantly. > > Just FYI - that won't max out the floating point units on there at all, and they can consume a significant amount of power. You want a benchmark that does some SSE floating point stuff to really burn some watts. We have our own chemistry that does this, but LINPACK is a pretty good one for stressing math units.
(We're about to get a quad socket 12 core @.2.2ghz 1U system for eval) _______________________________________________ Tech mailing list [email protected] http://lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
