[Beowulf] building Infiniband 4x cluster questions

Prentice Bisbal prentice at ias.edu
Mon Nov 7 11:36:22 EST 2011


On 11/06/2011 06:01 PM, Vincent Diepeveen wrote:
> hi,
>
> There is a lot of infiniband 4x stuff on ebay now.

Vincent,

Do you mean 4x, or QDR? They refer to different parts of the IB
architecture. 4x refers to the number of lanes for the data to travel
down and QDR refers to the data signalling rate.

It's probably irrelevant for this conversation, but if you are just
learning about IB, It's good to understand that difference.

Prentice
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