[ofa-general] fat-tree CN nodes?

[Cameron Harr]

Frank,
I'm going to step out of the discussion because I'm no authority in the 
code. My understanding is that the CN is there as a GUID (from the HCA) 
on the very bottom of the fabric - connected to the leaf switch. Someone 
who knows the  code will have to give you a real answer. Sorry.
Cameron

Frank Olaf Sem-Jacobsen wrote:
> Right,so it has no connection with any topological properties of the 
> fat tree? Which again means that the definition of compute nodes is 
> only necessary for the ability to balance these separately in the tree?
>
> Thanks for your answer,
>
> Cameron Harr wrote:
>> Hi Frank,
>> A compute node is a computer/server that is generally dedicated to 
>> doing computational work in a cluster or group of computers.
>> Cameron
>>
>> Frank Olaf Sem-Jacobsen wrote:
>>> Hi,
>>>
>>> I have been looking into the fat tree code, and I was wondering 
>>> about the definition of a compute node (CN). Are these part of the 
>>> leaf switches at the bottom of the fat tree, or are they extra 
>>> switches that are connected to the fat tree, e.g. the switch in a 
>>> rack of blades which is again connected to the fat tree?
>>>
>>> Appreciate the help,
>
>