Electrical Query

[andytork]

I have recently aquired a blade setup (28 xeon cpus) for some R&D I am doing at home.

The questions are:-

If I wanna run all 4 power supplies, then they require about 32amps combined. I don't need to run all PSU's , but would like the option. (Note : This blade setup won't be running 24/7 only being brought up when I have the spare time, before any greens start flapping )

Do I get a sparky to run a 32A line straight from the board (not a hard job I don't think in our place), but what does it terminate in ? A 32A switched single phase socket ?

Then do I aquire a powerboard from a rack, which usually come with 32A plug and 7/10 or so normal 10A sockets and use this. Or is there another option I am not seeing ?

Of course all of the above WILL be done by a registered sparky, I just wanna get some insight first.

Andy

 

[redbeard]

What are the outlets on the psu's ? Some have 10amp iec sockets, others are hardwired into the power supply. What brand / model - HP or IBM or ...
Im guessing your looking at 4 x 10amp or 2 x 15 amp or maybe 1 x 35?amp socket...

Depending on the blade chassis, you might get away with powering only 2 or 3 of the psu's if it has some redundancy. Usually there is a hi inrush current when 1st powering up, so a staggered approach would help. Do the blades have disks or inbuilt power monitoring (latest HP tells u how much power its using ) ?

 

[Banshee]

WOW, mega game server material or high trafic server. You starting up your own porn sites and hosting on the www?
As for your power demands, sorry cant help.

 

[Banshee]

http://www.datacentres.com/papers/papers/B...verSolution.pdf

Something to read.

 

[andytork]

It's an IBM setup. Has 4x iec 10 amp. Will run on two. I can even get away with one on some configs. But as I really need 2+ may as well go for all 4 and be ultra-safe.
I am running small low power disks in most of the blades. But will have 2-4 blades diskless at times

This is for r&d for an offline system not web based

 

[Ducatiboy stu]

I would be guessing that 32A is MAX load..

Are you planning to run at max capacity...ie every slot taken..??

If you knew the power requirements of each blade you want to use, then that will give you an idea of how much power you will need

 

[Airgead]

That's one heck of a setup for R&D. I don't know what you are R&Ding but if its just raw CPU cycles you need across a bunch of processors have you thought about running the setup in the cloud? Get a bunch of virtual CPUS on the Amazon cloud or something? I'm sure you have a reason for the setup you have (no one picks up that sort of kit just for shits and giggles... well no normal person anyway) but if you don't need the CPUs local the cloud could save you a bunch on electrical work (and ongoing power costs).

Cheers
Dave

 

[andytork]

That's one heck of a setup for R&D. I don't know what you are R&Ding but if its just raw CPU cycles you need across a bunch of processors have you thought about running the setup in the cloud? Get a bunch of virtual CPUS on the Amazon cloud or something? I'm sure you have a reason for the setup you have (no one picks up that sort of kit just for shits and giggles... well no normal person anyway) but if you don't need the CPUs local the cloud could save you a bunch on electrical work (and ongoing power costs).

Cheers
Dave

I usally work in virtualised environments, I was about to build a Hyper-V setup, but in really , the blade works better for what I am doing (and is a shed load cheaper than a Hyper V box to run the numbers of guests I need) . The system I am working on processes > 100 TPS, I need to test things in realtime. For this the cycles are not important, its more the independant I/O and timings (which the blades give me)

As far as power, its only going to be on while I am doing my R&D or testing, so uptime of the chassis will be low, but I want to test high load and failovers, so would like the 32Amps available

Andy

 

[Ducatiboy stu]

Better get one of these... :icon_cheers: