[Beowulf] ***UNCHECKED*** Re: [EXTERNAL] Re: Re: Spark, Julia, OpenMPI etc. - all in one place

[Michael Di Domenico]

On Thu, Oct 15, 2020 at 10:38 AM Lux, Jim (US 7140)
<james.p.lux at jpl.nasa.gov> wrote:
>
> What I find fascinating about the poster from NASA is the comment about "man in the loop data product generation" - this is what has always interested me - being able to get interactive supercomputing - My desires have always been to run moderately large models (run time >30 seconds) with large parameter spaces, in an interactive sense, so I can "turn the knobs" on the design.
>
> For example, in the last year, I've been running a lot of models of an antenna forming the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA). This is a large array of hundreds of antennas scattered across a few sq km near Big Pine, CA and observes the cosmos in the 30-80 MHz band. The properties of a single antenna are easy and quick to model.  But there's a bunch of questions that require more time - What's the interaction between the antennas? How close can they be and not interact? What's the effect of manufacturing tolerances? When it rains, and the dirt under the antenna is wet, how much does that change the response?
>
> Similarly, I've been doing models of wire antennas on the surface of the Moon, for 100kHz to 50 MHz.  Any one antenna is trivial and quick to model (and, for that matter, there are analytic models that are pretty good).  But we've got the same questions.  What if the rover laying the wire out doesn't do it in a perfectly straight line? What's the interaction between 2 antennas that are 300 meters apart (given that the wavelength at 100kHz is 3km, the antennas are "close" in electromagnetic terms)?

i'm no researcher, but very interesting work indeed.  it would seem
you're realtime antenna modeling is something that could be done
realtime.  much like how matlab can fireoff a realtime backend
computation using multiple machines from the gui.  i would guess the
software just isn't built to do it, but i have no idea how this works