yade-mpi team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>]

Hi,

On 11/27/18 8:32 PM, Robert Caulk wrote:
> Hey Deepak,
>
> Feel free to add it! I should also point out that I just pushed 2 
> methods for automatic 3D domain decomposition. One of the methods uses 
> least squares to minimize the differences between subdomain x,y,z 
> lengths and [1].
Whenever "length" appears somewhere it is not a bad idea to define it as 
max(x,y,z) instead of sqrt(x²+y²+z²). Just because this norm corresponds 
to the axis-aligned bounding box norm.

> If you ask it for an "odd" number of workers (domains) it splits some 
> of the domains to make use of remaining workers (you can also manually 
> control the decomposition so you could just decompose evenly along one 
> axis, maybe more suitable for "odd" worker requests). The other 
> decomposition method uses a sparsely generated random point cloud to 
> set an arbitrary number of randomly shaped subdomains [2]. Feel free 
> to test them out [3].

It seems we need to have a naïve decomposition for a start  (fixed 
cartesian grid, most likely) else it will be impossible to quantify 
progress on this aspect in the hackaton.

B