Hi Alessandra,
On Mon, 31 Oct 2016, Alessandra Forti wrote:
> Hi Steve,
>
> On 31/10/2016 14:47, Stephen Jones wrote:
>> Hi Alessandra,
>>
>> I have a couple of questions before I do the numbers for this.
>>
>> > >
>> > > json file with the numbers for the month contained in the Status
>> > > field the elements of the array of numbers are: HS06 on the
>> > > atlas dashboard, HS06 in APEL, ratio, wallclock in ATLAS,
>> > > wallclock in APEL, wallclock ratio.
>>
>> Would you please expand on the meaning of these fields (HS06 measures
>> Power, not Work; pls. see other (long) thread!?!)
>>
>> * HS06 on the atlas dashboard - I assume we mean "CPU Work" (in HS06
>> Hours) And how was this measured by ATLAS?
>>
> no, we measure everything in wallclock now. So in the new terminology it
> would be "wallclock work". The numbers in the SSB are obtained multiplying
> the "Delivered power" by the number of hours in the month for each month. The
> delivered power is in the atlas dashboard and is calculated the opposite way
> dividing the wallclock work measured in the dashboard by the number of hours
> in the month (I know its confusing).
>> * HS06 in APEL - I assume we mean "CPU Work" (in HS06 Hours) as measured
>> at the site. Please confirm.
>>
I'm not sure if I understand it or if it makes sense that way:
Basically what you are saying is that the initial number values
"HS06 on the atlas dashboard, HS06 in APEL, ratio, wallclock in ATLAS,
wallclock in APEL, wallclock ratio"
are really
"wallclock work in the Atlas, wallclock work in APEL, ratio, wallclock
work in Atlas (unscaled), wallclock work in APEL (maybe scaled)",
isn't it?
If so, why is there a difference between the first and forth value (2nd and 6th)?
Also, wouldn't there automatically be a difference between the APEL values
and the Atlas ones, if a site runs (mainly) jobs for other LHC
experiments and/or uses different CPUs/HT settings in the batch farm
machines?
Cheers,
Marcus
--
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
|