[CentOS] OFFTOPIC :: IB hardware choice

Wed Apr 6 16:04:56 UTC 2011
Peter Kjellström <cap at nsc.liu.se>

On Wednesday, March 23, 2011 03:02:16 pm Adrian Sevcenco wrote:
> Hi! I would need an advice from those that use IB (as admins :) )
> i have a choice between :
> 1. Mellanox InfiniHost® III Lx HCA card, single-port CX4, DDR, PCIe
> x8, mem-free, tall bracket, RoHS R5
> 2. QLogic Single Port 20 Gb InfiniBand to x16 PCI Express Adapter
> (Single Pack)

First, both of the above HCAs are old, I'd recommend going with either a 
Mellanox Connectx(-2) or Qlogics current 73xx.

Secondly, it's hard to recommend anything if you don't tell us what you're 
going to use them for. Does "parallel cluster" mean MPI?

Some random notes:
 * the InfinihostIII-lx is a cheap well working (although old) HCA
 * I'm guessing the Qlogic you had in mind was the QLE7280? if so:
  - 16x PCI-e does not fit everywhere


> aside the price is there anything else that could help me make a
> discrimination between this two?
> (these will be used in twin servers for a small (up to 24 nodes)
> parallel cluster)
> Thanks!
> Adrian

-= Peter Kjellström
-= National Supercomputer Centre
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