[petsc-users] MPI-IO

[Jed Brown]

Barry Smith <bsmith at mcs.anl.gov> writes:
>     We should change this to use a PetscViewerFormat instead of special casing it.

It's not really a "format", but it would be nice to have a common way to
address other viewer implementations.

>> PETSc devs, do you suppose MPI-IO support is stable enough that we could
>> make this a default?
>
>      It is not so much a question of stability, it is more a question
>      of (I believe) MPI IO is just loads slower for what might normal
>      PETSc users use, it only pays off for large numbers of nodes.

Do we have current data demonstrating that this is still the case?  It's
really a failure of the implementations if they can't fall back to the
dumbest mechanism when it's faster.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 818 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20140721/3b0dd050/attachment.pgp>