On Tue, Jun 29, 2010 at 20:48, Yujie <recrusader at gmail.com> wrote:
> Thank you very much! I am writing it in parallel mode. I am using > MPICH not MPICH2. I don't know the mechanism in MatView. If I write in > paralle, there is no communication between nodes? > There is still communication with the (parallel) file system. I think there should be no problem if the local blocks are smaller than 2 GiB but there may be issues with larger blocks. MPICH1 is old and unsupported, you should definitely upgrade unless you need support for a heterogeneous cluster (mix of 32 and 64-bit or different endianness). Jed -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20100629/62646326/attachment.htm>
