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Implementation of the Database Machine Direct
November 1982 (vol. 8 no. 6)
pp. 533-543
H. Boral, Department of Computer Sciences, University of Wisconsin
DIRECT is a multiprocessor database machine designed and implemented at the University of Wisconsin. This paper describes our experiences with the implementation of DIRECT. We start with a brief overview of the original machine proposal and how it differs from what was actually implemented. We then describe the structure of the DIRECT software. This includes software on host computers that interfaces with the database machine; software on the back-end controller of DIRECT; and software executed by the query processors. In addition to describing the structure of the software we will attempt to motivate and justify its design and implementation. We also discuss a number of implementation issues (e.g., debugging of the code across several machines). We conclude the paper with a list of the "lessons" we have learned from this experience.
Index Terms:
parallel processors, Associative processors, computer architecture, database machine, database management
Citation:
H. Boral, D.J. Dewitt, D. Friedland, N.F. Jarrell, W.K. Wilkinson, "Implementation of the Database Machine Direct," IEEE Transactions on Software Engineering, vol. 8, no. 6, pp. 533-543, Nov. 1982, doi:10.1109/TSE.1982.235882
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