Introduction
Parallel processing as a computing technology has been around almost as long as computers. However, it has only been in the last decade that systems based on parallel-processing technology have made it into the mainstream of computing. This paper explores the lessons learned about parallel computing at BBN and, on the basis of these lessons, our view of where parallel processing is headed in the next decade and what will be required to bring massively parallel computing into the mainstream.
BBN has a unique perspective on the trends and history of parallel computation because of its long history in parallel processing, dating back to 1972. BBN has developed several generations of computer systems based on parallel-processing technology and has engaged in advanced research in parallel algorithms and very-large-scale systems (Figure 1). In addition to parallel-processing research, BBN has been shipping commercial parallel processors since 1975 and has installed more than 300 systems. This represents approximately $100 million in investment of private and government funds in BBN parallel-processing technology and products.
BBN has developed extensive experience with parallel-processing systems during this 18-year period. Large numbers of these systems have been used by BBN in communications and simulation applications, most of which are still in operation today. BBN has also used BBN parallel systems in a wide range of research projects, such as speech recognition and artificial intelligence. This extensive experience using our own parallel computers is unique within the industry and has enabled BBN to better understand the needs of parallel computer users.
Figure 1.
BBN parallel processing systems and projects.