I have a question concerning having many processors in a mpi job all write to the same file -- not using mpi calls but with standard fortran I/O. I know that this can lead to consistency issues, but it can also lead to OS issues with some flavors of nfs.
At least in fortran, there is nothing "wrong" with doing this. My question is whether this is "One of the Seven Deadly Sins" of mpi programming, or just frowned on. (That is, it should be OK even if it leads to nonsense files, and not lead to OS issues.) If it is a sin, I would appreciate a link to where this is spelt out in some "official" document or similar. -- Laurence Marks Department of Materials Science and Engineering MSE Rm 2036 Cook Hall 2220 N Campus Drive Northwestern University Evanston, IL 60208, USA Tel: (847) 491-3996 Fax: (847) 491-7820 email: L-marks at northwestern dot edu Web: www.numis.northwestern.edu Chair, Commission on Electron Crystallography of IUCR www.numis.northwestern.edu/ Electron crystallography is the branch of science that uses electron scattering and imaging to study the structure of matter.
