[Beowulf] Channel bonding, again

2007-10-11 Thread Greg Lindahl
I'm thinking about using "balance-alb" channel bonding on a medium-to-large Linux cluster; does anyone have experience with this? It seems that it might generate a lot of arp replies if a switch fails. -- greg ___ Beowulf mailing list, Beowulf@beowulf.o

Re: [Beowulf] Re: Intel quad core nodes?

2007-10-11 Thread Robert G. Brown
On Thu, 11 Oct 2007, Alan Louis Scheinine wrote: When dual-core came out we had a debate here about the cost of dual-core versus single-core. There was not a cost savings if one considered just the CPU, but there was a cost savings if one considered the entire box. On the other hand, using benc

Re: [Beowulf] using extend-reach IB?

2007-10-11 Thread Mark Hahn
are they shipping? I checked their website a couple weeks ago and they were talking 1q08 availability. You must not have looked thoroughly enough ... ;-) ... and you tend to be very thorough, but it was after regular business hours. Intel is selling them directly from there webstore and they off

Re: [Beowulf] Re: Intel quad core nodes?

2007-10-11 Thread Alan Louis Scheinine
When dual-core came out we had a debate here about the cost of dual-core versus single-core. There was not a cost savings if one considered just the CPU, but there was a cost savings if one considered the entire box. On the other hand, using benchmark figures we saw that the performance scaled a

RE: [Beowulf] using extend-reach IB?

2007-10-11 Thread Gilad Shainer
You do have fiber cables that goes +100m with IB DDR, and should not be expensive. They have active component, and the adapters and switch you mention have support for those active or fiber cables already. Feel free to let me know if you need more info, or contacts for the cable vendors. Gilad.

[Beowulf] Re: Intel quad core nodes?

2007-10-11 Thread Maurice Hilarius
Daniel Pfenniger wrote: "But while configuring a cluster remember that you can get a better deal (=speed/cost for your application) by choosing cheaper CPUs in larger quantities." I disagree. Sometimes this is true, and sometimes it is not. The CPU cost is a fractional element of the total cost.

Re: [Beowulf] using extend-reach IB?

2007-10-11 Thread richard . walsh
-- Original message -- From: Mark Hahn <[EMAIL PROTECTED]> > > I can say a few words about optical active cable (OAC) choices. The > > current in production choice is from Intel, their Connects Cable. This is > > are they shipping? I checked their website a couple wee

Re: [Beowulf] using extend-reach IB?

2007-10-11 Thread James Cownie
Maybe these would do ? http://www.intel.com/design/network/products/optical/cables/ Enabling larger clusters and reduced installation and maintenance costs IntelĀ® Connects Cables, with 20 Gbps data rates at distances up to 100 meters, deliver the performance you need to build large, reliable