Hi Alessandra,
On 09/03/2012 16:13, Alessandra Forti wrote:
> Hi Rob,
>> Conversely, if we publish the number of hyperthreads and the appropriate HS06,
>> the size and composition of the cluster will also be accurate (for
>> hyperthreading), but our accounting would be significantly understated.
>>
> This is what Manchester is doing following the Glue schema. Of course we loose
> out when the cluster is half full but we try to keep it full and we use all the
> 24 slots so not being full is less systematic than what you want to do.
That's an option, but I don't think we'd really want to do that on our nodes.
Aside from the increased contention for I/O, our benchmarking shows total HS06
not only virtually flatlines but actually goes down as you reach full
hyperthreaded capacity on these boxes - the total HS06 for 24 runs is less than
the total HS06 for 18 runs.
Cheers,
Rob
--
Robert Fay [log in to unmask]
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