[petsc-users] PETSc and dense matrices

[RenZhengYong]

YES, :).

On Thu, Jan 6, 2011 at 7:19 PM, Raeth, Peter <PRaeth at hpti.com> wrote:

>  Are your matrices dense?
>
> Peter G. Raeth, Ph.D.
> Senior Staff Scientist
> Signal and Image Processing
> High Performance Technologies, Inc
> 937-904-5147
> praeth at hpti.com
>   ------------------------------
> *From:* petsc-users-bounces at mcs.anl.gov [petsc-users-bounces at mcs.anl.gov]
> on behalf of RenZhengYong [renzhengyong at gmail.com]
> *Sent:* Thursday, January 06, 2011 1:18 PM
> *To:* PETSc users list
> *Subject:* Re: [petsc-users] PETSc and dense matrices
>
>  Hi, Hamid,
> I am also using BEM to solve 3D EM problems.
> But I only am using the PETSc on one machine.
>
> Kind regards,
> Zhengyong
>
> On Thu, Jan 6, 2011 at 6:46 PM, Hamid M. <spam.wax at gmail.com> wrote:
>
>> Hello,
>>
>> In our research, we solve the diffusion equation PDE using Boundary
>> Element Method (BEM).
>> I am trying to parallelize the code we already have and I was
>> wondering if PETSc is the right tool for us.
>>
>> As you know, BEM produces a dense LHS matrix that needs to be solved.
>> Also due to the size of our problems, populating the entities of the
>> LHS matrix needs to be done on different processes as it won't fit on
>> a single process of our cluster.
>>
>> So I was wondering if you guys can answer my questions:
>>
>> 1- Can I use PETSc to build/populate my LHS matrix on different nodes
>> of a cluster (as opposed to constructing it on a single node and then
>> distributing it) ?
>>
>> 2- Are there optimized parallel solvers for dense matrices in PETSc ?
>>
>> 3- If the answer to question 1 is 'No', can I build my LHS matrix
>> independent of PETSc and then direct PETSc to solve it for me ?
>>
>> thanks in advance,
>>
>> Hamid
>>
>
>
>
> --
> Zhengyong Ren
> AUG Group, Institute of Geophysics
> Department of Geosciences, ETH Zurich
> NO H 47 Sonneggstrasse 5
> CH-8092, Zürich, Switzerland
> Tel: +41 44 633 37561
> e-mail: zhengyong.ren at aug.ig.erdw.ethz.ch
> Gmail: renzhengyong at gmail.com
>



-- 
Zhengyong Ren
AUG Group, Institute of Geophysics
Department of Geosciences, ETH Zurich
NO H 47 Sonneggstrasse 5
CH-8092, Zürich, Switzerland
Tel: +41 44 633 37561
e-mail: zhengyong.ren at aug.ig.erdw.ethz.ch
Gmail: renzhengyong at gmail.com
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