From: Jed B. <je...@59...> - 2010-09-09 15:02:39
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On Thu, 9 Sep 2010 16:47:38 +0200 (CEST), Tim Kroeger <tim...@ce...> wrote: > As far as I understand, this allows me to specify a partition of X2 > into some subsets and then select solvers/preconditioners for these > subsets as well as a global method to combine them. However, I assume > that this will *not* move dofs to different processors, will it? So I > can't use this to improve the load balancing, can I? Yes, you can. The index sets have a communicator, their distribution specifies the partition to use (so you can move dofs around at will). > I guess that this might be in particular a useful thing to do if X2 > naturally consists of more than one connected component. This might > (in my application) in fact be the case, but not canonically, and > figuring this out might be complicated, and I also assume that > SuperLU_DIST anyway identifies the connected components, so that, for > the moment, I don't think I will need this. Yup, depends on the problem and the method you are using. Jed |