PARALLEL PROCESSING
PARALLEL PROCESSING
PARALLEL PROCESSING
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EXAMPLE<br />
Calculate the column means of a data matrix<br />
Divide data into equal groups (or blocks) of rows<br />
for parallel processing (spawn)<br />
Is the array in memory or does it need to be<br />
read from disk?<br />
Memory access is at least an order of<br />
magnitude faster than disk access (depends on<br />
whether the access is sequential or random)<br />
Tuesday, August 20, 13