An adaptable multithreaded prefetching technique for client-server object bases

Authors:
Nils Knafla
Affiliations:
Department of Computer Science, The University of Edinburgh, James Clerk Maxwell Building, King’s Buildings, Mayfield Road, Edinburgh EH9 3JZ, Scotland, UK
Venue:
Cluster Computing
Year:
1998

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Abstract

Given the existence of powerful multiprocessor client workstations in many client-server object database applications, the performance bottleneck is the delay in transferring pages from the server to the client. We present a prefetching technique that can avoid this delay, especially where the client application requests pages from several database servers. This technique has been added to the EXODUS storage manager. Part of the novelty of this approach lies in the way that multithreading on the client workstation is exploited, in particular for activities such as prefetching and flushing dirty pages to the server. Using our own complex object benchmark, we analyze the performance of the prefetching technique with multiple clients and multiple servers. The technique is also tested under a variety of client host workload levels.