The setiomode function call is described in the on-line manuals for the Intel Paragon. This function changes how processors are allowed to access a file, and performs a global synchronization. Thus, file access may be tailored to fit the needs of the application and the data layout of the file. Each node has its own file pointer. Access is unrestricted.
All nodes use the same file pointer.
Access is first come, first served. Records may be of variable length. All nodes use the same file pointer. Access is in node order. Records are in node order but may be of variable length.