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Basic I/O Operations
Basic I/O operations are
- read from location
of an out-of-core matrix to location 
of an in-core matrix
- write to location
of an out-of-core matrix from location 
of an in-core matrix
where locations are global indices.
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Matrices are described by descriptors
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For distributed files, data distributions must be compatible
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The Basic Linear Algebra Parallel I/O Subprograms (BLAPIOS) are being
developed to perform parallel I/O for dense matrices.
Schematic of basic I/O operations
Slide 43 of Departmental seminar at UWCC, David W. Walker, UWCC. (Updated 01/31/96)