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
Section Correctness
on page Correctness
.
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.
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