Re: [Foam-extend-developers] foam-extend on tiny machines...

[Bernhard G. <bgs...@ic...>]

Am 28.10.15 um 16:07 schrieb Martin Beaudoin:
> 
> 
> On Wed, Oct 28, 2015 at 9:59 AM, Bernhard Gschaider <bgs...@ic...
> <mailto:bgs...@ic...>> wrote:
> 
> 
>     >     How long did compilation take?
>     >
>     >
>     > Not sure. The compilation went over multiple phases while I was nailing
>     > down the compilation recipe. I will push a full recompilation a little
>     > bit later next week, and give you the numbers. For sure, compiling over
>     > 4 cores do help a lot, and the speed of your microSD card do play a big
>     > factor as well.
> 
>     Because that was one of the reasons why I didn't try it on my RasPis.
>     Estimate was that it would take several days. I even thought about
>     setting up a virtual machine and cross-compiling (seems that this is the
>     way that packages usually are made for the RasPi)
> 
> 
> We are not talking multiple days of compilation for sure for a basic
> install. I think it is still within a 24 hours span, but I will have to
> check again.

That's consistent with my estimate at the time. From what I remember the
RasPi 2 is supposed to be 6 times faster than the original

> And I chose to reuse as many system ThirdParty packages as possible. So
> I did not recompile gcc nor openmpi. I also skipped the compilation of
> paraview and Qt. But I did compile swak4foam (without a glitch!)
> 

Good to hear

> As for using such small systems for the Workshop USB stick, if we can
> figure out a way to USB tether a RaspBerry Pi2 with a normal laptop +
> some kind of terminal app. so we can simply ssh through the USB link,
> then we could have cheaper solution than the Intel stick.
> 
> Here is a rough estimate of the cost in USD$, based on the units I have
> bought so far:
> 
>   * RaspBerry Pi 2 Model B :            35$
>   * 32GB Ultra MicroSDHC Class 10 card: 15$
>   * A Raspberry Pi2 case :              10$
>   * A USB cable for power and tether :   5$ 
> 
> For a total of roughly 65 $USD.  
> 
> And a 32GB card is slightly roomy. The OS is free, and the recipe to
> deploy foam-extend over this device is known.
> 
> And we are still not talking bulk pricing here. I am sure we can shave a
> few $ if we buy a 100 of those...
> 
> So the only piece of the puzzle remaining is a little bit of software
> for USB tethering....
> 
> Maybe we can do all this as well with an Intel Compute stick. Both
> solutions would be way cool...

But the ultimate decision is of course with the Workshop organizer.
Because of course the logistics for the production of USB-keys is
already known

But lets see if we find something

Bernhard


> 
> Martin
> 
> 
> 
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