[Beowulf] Home Beowulf

2009-10-05 Thread Dmitry Zaletnev
Hello, list, I just thinking about a 2-nodes Beowulf for a CFD application that reads/writes small amounts of data in random areas of RAM (non-cached translation). What would be the difference in overall performance (I suppose, due to the memory access time) between Q9650/ 8 GB DDR2-800 and i7

Re: [Beowulf] recommendation on crash cart for a cluster room: full cluster KVM is not an option I suppose?

2009-10-05 Thread Rahul Nabar
On Sat, Oct 3, 2009 at 4:11 PM, Mark Hahn wrote: > that's local ipmi, which to me is quite beside the point.  ipmi is valuable > primarily for its out-of-band-ness - that is, you can get to it when the > host is off or wedged. True. I was just testing it locally before I tested remote. >> you

Re: [Beowulf] RAID for home beowulf

2009-10-05 Thread Tim Cutts
On 5 Oct 2009, at 11:02 am, Tomislav Maric wrote: OK, I guess then Ubuntu will suffice for a 12 node Cluster. :) Anyway, I'll try it and see. Thanks! We run Debian on our clusters, so you're definitely not the only person using a Debian-based distro for your cluster. Debian does have a ki

Re: [Beowulf] ATX on switch

2009-10-05 Thread Andrew Piskorski
On Sun, Oct 04, 2009 at 02:56:33PM +0200, Tomislav Maric wrote: > where can I get an "on/off" and "reset" switch for ATX motherboard > without buying and ripping apart a case? I no longer remember where I bought mine, but googling for "ATX power switch" or the like will find you lots of options,

Re: [Beowulf] RAID for home beowulf

2009-10-05 Thread Tomislav Maric
Mark Hahn wrote: >> the other nodes are to be diskless.. I have separated these partitions: >> /swap /boot / /var and /home. Is this ok? > > I don't believe there is much value in separating partitions like this. > for instance, a swap partition has no advantage over a swap file, > and the latte

Re: [Beowulf] ATX on switch

2009-10-05 Thread Tomislav Maric
Thanks Michael! If I'm going to use switches, I'll definitely get this kit. :) Best regards, Tomislav Michael Di Domenico wrote: > You can get a full complement of switches and leds for under 10 bucks. > Just search froogle for "atx power switch". I've purchased the > StarTech kits in the past.

Re: [Beowulf] RAID for home beowulf

2009-10-05 Thread Tomislav Maric
Nifty Tom Mitchell wrote: > On Sun, Oct 04, 2009 at 01:08:27PM +0200, Tomislav Maric wrote: >> Mark Hahn wrote: I've seen Centos mentioned a lot in connection to HPC, am I making a mistake with Ubuntu?? >>> distros differ mainly in their desktop decoration. for actually >>> getting clus

Re: [Beowulf] re: power prediction and planning

2009-10-05 Thread John Hearns
2009/10/5 Mark Hahn : > also, does anyone have thoughts about machineroom features that would > support multiple generations, preferably without a lot of reno? > for instance, we have mostly L6-30 power, which seems reasonably safe for > commodity systems.  but how about rack-back water cooling sy

[Beowulf] re: power prediction and planning

2009-10-05 Thread Mark Hahn
in reference to recent mention of TDP and power planning, what do you think the trend in the next few years will be? 5 years ago, people were talking about exponential increases in power and power density - afaikt with straight faces. that clearly didn't happen. in fact, dissipation has clearl