Thomas,
There is no way to have parallel subdomains in PETSc 3.1 for additive
Schwarz but one of us has just added support in petsc-dev for exactly this
approach. You can access petsc-dev via
http://www.mcs.anl.gov/petsc/petsc-as/developers/index.html Since this is a
new not yet released feature please join the mailing list petsc-dev at
mcs.anl.gov
http://www.mcs.anl.gov/petsc/petsc-as/miscellaneous/mailing-lists.html and
communicate issues regarding this top on that list.
Barry
On Jan 24, 2011, at 8:09 AM, DUFAUD THOMAS wrote:
> Hi,
> I noticed that the local solution of an ASM preconditioner is performed on a
> single processor per domain, usually setting a KSP PREONLY to perform an ILU
> factorization.
> I would like to perform those local solution with a krylov method (GMRES)
> among a set of processors.
>
> Is it possible, for an ASM preconditioner, to set a subgroup of processors
> per domain and then define parallel sub-solver over a sub-communicator?
>
> If it is the case how can I manage operation such as MatIncreaseOverlap?
> If it is not the case, does it exist a way to do that in PETSc?
>
> Thanks,
>
> Thomas
