[Beowulf] Dual IB Cards in a Single Box

[Prentice Bisbal]

I have a cluster with Dell blades. The Chassis has FDR, but the TOR IB 
switches are only QDR. No problems

On 5/10/19 1:44 PM, Jörg Saßmannshausen wrote:
> Hi Paul,
>
> if that is a Mellanox network I would have thought that putting in a single,
> dual port HDR InfiniBand card would do the trick as well. From what I
> understand, the HDR will use the slower FDR speed when the other end is only
> EDR.
> I done a similar setup with a mixed network where the switch is FDR but some
> of the nodes are only QDR and here the connection is throttled down to QDR.
>
> I might, of course, be wrong here.
>
> All the best from a sunny London
>
> Jörg
>
> Am Freitag, 10. Mai 2019, 12:13:42 BST schrieb Paul Edmon:
>> We are looking to bridge our FDR fabric to our HDR fabric via LNET and
>> we had a question about whether a single machine can have 2 different IB
>> cards simultaneously. Does anyone have any experience with that or know
>> if there are any hitches with having a single box with a FDR card and a
>> HDR card running simultaneously?
>>
>> -Paul Edmon-
>>
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