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)
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
Hi! I would need an advice from those that use IB (as admins :) ) i have a choice between : 1. Mellanox InfiniHost(r) 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)
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
I would be curious to know what the QLogic IB card is. There was a version that was a Mellanox chip. Those things were terrible.
If it's a model 7200 series I believe it's a qlogic chip known as either PathScale or TrueScale. These chips perform WAY better than the InfiniHost chips. Especially if you use an MPI library that is able to make use of QLogic's now open source PSM stuff.
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Tony Placilla aplacilla@jhu.edu
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 :
- Mellanox InfiniHost® III Lx HCA card, single-port CX4, DDR, PCIe
x8, mem-free, tall bracket, RoHS R5
- 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
/Peter
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
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Adrian Sevcenco -
Peter Kjellström -
Tony Placilla