[petsc-users] Paralell matrix storage

[Mohammad Mirzadeh]

I assume you could also use AO ?

On Wed, Jul 27, 2011 at 6:01 AM, Matthew Knepley <knepley at gmail.com> wrote:

> On Wed, Jul 27, 2011 at 8:22 AM, Stefan Kolb <skolb at rocketmail.com> wrote:
>
>> Hi,
>>
>> I have read in the user-manual that parallel sparse matrices are stored in
>> the
>> manner that the first n1 rows are stored on the process with rank 0 and
>> the
>> next n2 rows on the process with rank 1 and so on. My question is now, is
>> it
>> possible to store for example the rows 0 to 24 and 50 to 74 on process
>> with
>> rank 0 and 25 to 49 and 75 to 99 on process with rank 1 for a 100x100
>> matrix
>> with two processes.
>>
>
> No. The effect of a permutation is accomplished with a MaOrdering.
>
>    Matt
>
>
>> Best regards,
>> Stefan
>>
>
>
>
> --
> 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
>
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