Graeme Stewart wrote:
> On 2 Nov 2007, at 10:57, Burke, S (Stephen) wrote:
>>> Since _LCG_ were never interested in SMP processing, there wasn't a
>>> penalty in making the site look like a larger number of
>>> smaller single-CPU boxes.
>>
>> There may however be some interest from other VOs in knowing the real
>> situation ... I can see the logic in this kind of thing but it also
>> inclines me to despair, because the implication is that it's pointless
>> to try to fix things which are broken, the best we can do is break
>> something else to compensate!
>
> I think it will become important to sort this properly, but at the
> moment the big block is the lcg-RB and CE which deal with MPI jobs in an
> appalling (and hard coded) way. Stephen Childs has put in a lot of
> effort to work around the most egregious flaws and more or less get MPI
> to work on EGEE clusters.
>
> With the glite-WMS now being rolled out, then I think the job wrappers
> for MP(I) can be more flexibly, and sensibly, implemented.
>
> MPI might not be of much interest to HEP, but with the core explosion on
> chips MP jobs might well be.
Coming late to this discussion but just to second Graeme's comment. I can
understand why you have to work around for the moment but it would be good
if those close to Atlas could apply gentle pressure to get them to use the
GLUE information properly as otherwise we are losing information which is
of use to MPI and MP users.
Stephen
--
Dr. Stephen Childs,
Research Fellow, EGEE Project, phone: +353-1-8961797
Computer Architecture Group, email: Stephen.Childs @ cs.tcd.ie
Trinity College Dublin, Ireland web: http://www.cs.tcd.ie/Stephen.Childs
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