[Beowulf] Infiniband Subnet Manager
prentice at ias.edu
Fri Sep 5 10:48:16 EDT 2008
Nifty niftyompi Mitch wrote:
>> I've gotten a lot of response to my IB questions that I posed to the
>> list. Thanks for all your help. All of my questions have been answered.
>> It turns out, as some as you pointed out, that my switch will have a
>> built-in subnet manager, so I won't need to run one on a node.
> I should add that a built in subnet manager is extra $$. Also they tend
> to run on a modest dedicated processor card. The modest dedicated card
> solutions have limited RAM and will not support a gonzo big fabric.
> A rule of thumb, depending on the subnet manager on the card the run out of memory
> recources trip point is about 144 ports.
> The richer the statistics gathered and retained the larger the footprint is.
> Large fabrics will need a host based subnet manager.
Thanks my cluster is only 64 nodes, so that shouldn't be a problem.
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