[FLASH-USERS] FLASH scalability on parallel computing test

[ERNESTO ZURBRIGGEN]

Ryan and John thank you for your answers!

On Wed, 8 Jan 2025 at 14:39, John Zuhone <jzuhone at gmail.com> wrote:

> Hi Ernesto,
>
> Yes, typically HPC resources will allow you to request a small start-up
> allocation in order to do such scaling tests on their own machine before
> you ask for a larger allocation to do production runs. I imagine that they
> will be very reluctant to accept a scaling test from another architecture.
>
> Best,
>
> John ZuHone
>
> On Jan 8, 2025 at 12:34:20 PM, Ryan Farber <rjfarber at umich.edu> wrote:
>
>> Hi Ernesto,
>>
>> You should perform your scaling study on the machine itself and *not*
>> recycle old scaling plots, as the scaling will depend on the properties of
>> the machine (e.g., interconnect hardware, specific MPI library plus wrapper
>> (intel vs gcc etc)).
>>
>> But for inspiration, you can search the FLASH mailing list archive and I
>> think circa 2016 Sean Couch still has the most impressive scaling plot I’ve
>> seen.
>>
>> Best wishes,
>> Ryan
>>
>> Sent from my iPhone
>>
>> On 8. Jan 2025, at 06:05, ERNESTO ZURBRIGGEN <ezurbriggen at unc.edu.ar>
>> wrote:
>>
>> 
>> Hello everyone!
>> I am writing a proposal for HCP computing in a cluster with FLASH as the
>> main code to be used. And I was wondering where I can find an MPI
>> scalability test to include in the proposal. This is mandatory in the call.
>>
>> I thought I had seen a scalability plot in the user manual, but I can't
>> find it.
>>
>> Best regards!
>>
>>
>> --
>>
>> *PhD Ernesto Zurbriggen,*
>> *Assistant researcher (CONICET)*
>>
>>
>>
>> *Email: ezurbriggen@ <ernesto.zurbriggen at craam.mackenzie.br>unc.edu.ar
>> <http://unc.edu.ar/>IP phone: (+54) 351-535 3776 (int. 75601)*
>> *Instituto de Astronomía Teórica y Experimental (IATE-CONICET), *
>> *Francisco Laprida sth 922**, X5000BGR, **Córdoba, **Argentina. *
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