[petsc-users] ParMETIS produces different partitions with 32-bit and 64-bit integers respectively

[Matthew Knepley]

On Wed, Nov 21, 2018 at 12:12 PM Fande Kong via petsc-users <
petsc-users at mcs.anl.gov> wrote:

> Hi Developers,
>
> I was wondering if it is normal that I will have a different partition
> when switching from 32-bit integers to 64-bit integers
> ( --with-64-bit-indices)? ?
>
> And this happens only when we apply weights (either edge or vertex
> weights).
>
> An example is attached.
>

ParMetis has randomization. It gives different partitions even on different
architectures. This does not surprise me.

  Matt


> Thanks,
>
> Fande
>
>
>

-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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