Hum... ok, I'll take a look at that. Thanks for pointing it out. I just hope
it won't take too long to digest.
Mathieu
-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM]On Behalf
Of Halfdan Ingvarsson
Sent: Tuesday, April 25, 2006 3:11 PM
To: XSI(at)Softimage.COM
Subject: RE: network distributed particle simulations?
There's always Open-MPI, which does exactly (and more) what you're looking
for. http://www.open-mpi.org/
It implements the interface defined here: http://www.mpi-forum.org/docs/
Like most distributed systems' internals, it's rather quite scary at first,
although it is a hell of a lot easier than trying to develop one yourself.
- ½
> -----Original Message-----
> From: owner-xsi(at)Softimage.COM
> [mailto:owner-xsi(at)Softimage.COM]On Behalf
> Of Mathieu Leclaire
> Sent: Tuesday, 25 April, 2006 14:54
> To: XSI(at)Softimage.COM
> Subject: RE: network distributed particle simulations?
>
>
> well, like I said, it's not the simulation that needs to be
> distributed...
> it's the calculations done in my custom command. I need to ba
> able in my
> custom command to call some evaluations on different
> computers. For example,
> the custom commands asks computer 1 to evaluate particles 0
> to 99, computer
> 2 to evaluated particles 100 to 199... and then wait for the
> results before
> writting them to the UserDataBlob and then going to the next
> frame. So it's
> not the particle simulation per say but the custom command
> that the event
> calls that needs to be distributed through the network.
>
>
> Mathieu
>
> -----Original Message-----
> From: owner-xsi(at)Softimage.COM
> [mailto:owner-xsi(at)Softimage.COM]On Behalf
> Of Kris Rivel
> Sent: Tuesday, April 25, 2006 2:24 PM
> To: XSI(at)Softimage.COM
> Subject: Re: network distributed particle simulations?
>
>
> An hour per frame....wow, you don't mess around do you :-) I didn't
> think distributing particles was possible. I know that the Next Limit
> guys are working on this I think but the obvious problem is that you
> need the previous frame to simulate the next frame, etc.
>
> Kris
>
> Mathieu Leclaire wrote:
> > OK, I'm still working on my particle simulations here... A
> particle cloud
> > with a scripted event that calls a custom command on every frame to
> > calculate a special collision event, where it passes
> information from one
> > cloud to another through a UserDataBlob when certain
> particles collide.
> > Anyway, the thing is, for the number of particles that I
> need, and even
> > though I believe I've optimized the simulation as best I
> can, it takes
> > roughly an hour a frame to calculate my simulations. At 200
> frames, well,
> it
> > takes more then a week of simulation using one machine. We
> have a pretty
> big
> > render farm here so if I could find a way to use it to split the
> simulations
> > over multiple machines, then we can make the simulations in a more
> > reasonable time frame. So my question is this: how can I
> distribute my
> > simulations over a network? What would be the best way to
> approach the
> > issue? I need to have xsi evaluate the cloud normally, make
> the particles
> > move depending on forces and once the particles are
> positioned correctly,
> my
> > scripted event is called that calls the custom command. How
> can I separate
> > the process of that custom command over multiple machines
> so that one
> > machine calculates lets say the first 100 particles, and
> the next one
> > calculates another group of 100 particles and so on, until all the
> particles
> > have been evaluated and all the resulting data can be passed to the
> > UserDataBlob... I just want to make sure you guys
> understand that what
> needs
> > to be distributed is the evaluation in my custom command
> that happens
> > between each frames and that, depending on that result, the
> particles will
> > change and affect the following frame. So before the next
> frame can be
> > evaluated, the current network process must be done before
> the next frame
> > can start. Any suggestions on how to do something like
> that? Anyone had to
> > deal with something similar? Any help or suggestions would
> be greatly
> > appreciated.
> >
> >
> > Mathieu Leclaire
> > R&D Programmer
> > Hybride Technologies
> >
> >
> >
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