I have just read the page and I have one more concern to make things
clear.  Will dealII need to read in the whole mesh in one node and do
the partition work and then redistribute the mesh partitions to
different nodes?  I guess this will influence the scale of the problem
can be solved.

It will need to read the entire coarse mesh on *every* node, but you can then refine it in a distributed way. That obviously limits the size of the coarse mesh (we've done tests with a couple of 100,000 coarse mesh cells) but not of the fine mesh (we've tested to 10^9 or so cells).

Best
 W.


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Wolfgang Bangerth               email:            [email protected]
                                www: http://www.math.tamu.edu/~bangerth/

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