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Parallel query scheduling and optimization with time- and space-shared resources

Garofalakis Minos, Ioannidis, Yannis, 1930-

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Περίληψη

Scheduling query execution plans is a particularly complexproblem in hierarchical parallel systems, where eachsite consists of a collection of local time-shared (e.g.,CPU(s) or disk(s)) and space-shared (e.g., memory) resourcesand communicates with remote sites by messagepassing.We develop a general approach to the problem,capturing the full complexity of scheduling distributedmulti-dimensional resource units for all kinds of parallelismwithin and across queries and operators. We presentheuristic algorithms for various forms of the problem, someof which are provably near-optimal. Preliminary experimentalresults confirm the effectiveness of our approach

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