9.6.4 Collective File Operations

Collective file operations are subject to the same restrictions as collective communication operations. For a complete discussion, please refer to the semantics set forth in MPI-/ [6], Section 4.12.

Collective file operations are collective over a dup of the communicator used to open the file--this duplicate communicator is implicitly specified via the file handle argument. Different processes can pass different values for other arguments of a collective routine unless specified otherwise.

MPI-Standard for MARMOT