The Journal of Supercomputing
A memory accelerator with gather functions for bandwidth-bound irregular applications
Proceedings of the first workshop on Irregular applications: architectures and algorithm
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Response time in database systems is not getting small as a processor speed is accelerating because of a growing gap between speed of the processor and that of a memory, and increase in data size. A conventional memory controller and caches in a processor cannot provide enough bandwidth of data transfer between a processor and memory. For fast processing with large data, it is effective to equip a memory controller with mechanisms for transferring large data and a processor with a buffer for receiving the data. In this paper, to accelerate query processing we propose the fast and large scale data transfer methods that take advantage of the data structure in main memory database systems and the characteristics of DRAM, and evaluate them in simulations on several queries. The simulation shows that the query processing with the proposed mechanisms exhibits about 10 times faster execution than a conventional method.