Dear PETSc users, I would like to use Petsc4Py for a project extension, which consists mainly of:
- Storing data and matrices on several rank/nodes which could not fit on a single node. - Performing some linear algebra in a parallel fashion (solving sparse linear system for instance) - Exchanging those data structures (parallel vectors) between non-overlapping MPI communicators, created for instance by splitting MPI_COMM_WORLD. While the two first items seems to be well addressed by PETSc, I am wondering about the last one. Is it possible to access the data of a vector, defined on a communicator from another, non-overlapping communicator? From what I have seen from the documentation and the several threads on the user mailing-list, I would say no. But maybe I am missing something? If not, is it possible to transfer a vector defined on a given communicator on a communicator which is a subset of the previous one? Best regards, Jean-Christophe
