[Beowulf] Quadrics?

[Vincent Diepeveen]

hi,

sometimes i go through a lot of mails at the mailing list here and  
had missed this one.
please keep me up to date and/or add me to mailing lists there.

latency is superior of quadrics compared to all the infini* stuff.
drivers that integrate into kernels - well some modifications  
shouldn't be too hard.

Of course even the realtime linux kernel is rather crappy there, as  
it locks every action
from and to a socket (even RAW/UDP communication in fact),
so you need a 'hack' of that kernel anyway to get faster latencies.

secondhand the quadrics stuff is cheap it seems.

Vincent

On Jan 11, 2011, at 5:55 PM, Daniel Kidger wrote:

> Mark,
>
> I will let others step forward individually.
>
> I was one of the last employees to leave Quadrics , so I do know  
> who had
> support contracts at that time, plus the even larger set of sites that
> had expired support contracts but still were actively running their
> QsNet clusters.
>
> You know that a company called Vega took on the ongoing support? :
> here is the website I set up at the time: https:// 
> support.hpc.vega.co.uk/
>
> I agree too though that there should be a community of QsNet-owning
> enthusiasts, who could provide mutual support in this legacy era.
>
>
> Also off the record, I know that there is a lot of Elan4 stock sitting
> in a warehouse. As long as you are not looking for long term vendor
> support, I expect  you could acquire cards, cables and switches for a
> bargain price.
>
> Daniel
>
>
>> Are you still using Quadrics Elan4-based clusters?
>>
>> We would like to continue using Quadrics on one of our clusters,  
>> since it
>> is still quite good in latency.  Maintaining the Quadrics drivers,  
>> though,
>> is a bit of a pain going forward - would be nice to avoid  
>> duplicating effort,
>> if there are other groups also doing so.
>>
>> please follow up or email me if you are using Elan4, or know anything
>> relevant.
>>
>> thanks,
>> Mark Hahn | SHARCnet Sysadmin | hahn at sharcnet.ca | http:// 
>> www.sharcnet.ca
>>             | McMaster RHPCS    | hahn at mcmaster.ca | 905 525 9140  
>> x24687
>>             | Compute/Calcul Canada                | http:// 
>> www.computecanada.org
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>
>
> -- 
> Bull, Architect of an Open World TM
>
> Dr. Daniel Kidger, HPC Technical Consultant
> daniel.kidger at bull.co.uk
> +44 (0) 7966822177
>
>
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