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I was checking partitioning capabilities of Metis (mpmetis) when I noticed, that it leaves two single nodes. I have marked them in red http://i.imgur.com/Eltz4.png

Have you seen something similar or maybe it is my mistake?

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Can you give some more information how to interpret the figure? – Thomas Witkowski Sep 28 '12 at 13:26
This is like the entire mesh looks like: i47.tinypic.com/33ekfmh.png Elements are typical, 8-nodals quadrilateral. I used mpmetis without any options to create 2 partitions. It produces two partitions: i49.tinypic.com/23k56s2.png i50.tinypic.com/11afx1u.png First part contains single nodes - not connected to any elements. Second is fine. – Krzysztof Bzowski Sep 28 '12 at 13:51

1 Answer

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Metis does not guarantee that the partitions are non-empty, so your code must deal with this situation.

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OK, but even if the code deals with it, the loadbalancing will still be horrible, no? Why does Metis produce this output? – Thomas Klimpel Sep 30 '12 at 19:50

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