Infiniband adapter question. mellinox vs other brands and cx2vs 3

[kendrick]

I have noticed a few 12$ ib cards from qlogic and cx2 rebaged as sun. is there any reason on the ib side to get a cx3 pro vs 3 reg or 2? I was not seeing any documentation related to ib performance only the v1 vs v2 roce.

For now the only concern i have is ib related performance on these cards and I wont be using the 10gbE at all. If the 12$ cards work just as well as the 40$ cx3pros ill probably pick several of them up. with that assumption has any one had issues reflashing the sun adapters back to mellinox firmware?

 

[necr]

I’d stay away from the QLogic IB stuff - not supported and developed anymore, QDR only, too. There are some corner cases and misbehavior even tho both Mellanox and QLogic must follow the same IBTA standards...CX-2 support is about to be dropped, so I’d stay away from that.

 

[i386]

Connect-x 3: max fdr (56gbit/s infiniband), pcie 3.0
Connect-x 2: max qdr (40gbit/s infiniband) pcie 2.0