Parallelism in a Main-Memory System: The Performance of PRISMA/DB


Wilschut, A.N. and Flokstra, J. and Apers, P.M.G. (1992) Parallelism in a Main-Memory System: The Performance of PRISMA/DB. In: Proceedings of the 18th International Conference on Very Large Data Bases (VLDB 1992), 23-27 Aug 1992, Vancouver, Canada (pp. pp. 521-532).

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Abstract:his paper evaluates the performance of the parallel, main-memory DBMS, PRISMA/DB. First, an abstract architecture for parallel query execution is presented. A performance model for the execution of simple relational operations on this architecture is developed. The parameters in the model are set using experiments on PRISMA/DB and the performance of PRISMA/DB is analized in the context of the model. Several conclusions can be drawn from the model combined with the results of the performance experiments. Firstly, the performance of PRISMA/DB appears to be competitive with respect toother systems. Secondly, the developed model can explain the results from the performance experiments to a large extent. Also, it is concluded that observed linear speedup for small numbers of processors cannot always be extrapolated to larger numbers of processors. Finally, it is concluded that the optimal number of processors for the parallelexecution of an operation is smaller for a main- memory system than for a disk -based system. The results of this study can be used to design data fragmentation strategies for large parallel machines.
Item Type:Conference or Workshop Item
Additional information:Imported from EWI/DB PMS [db-utwente:inpr:0000003143]
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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