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Benchmarking Inter and Intra Operator Parallelism on Contemporary Desktop Hardware

In this paper we explore effects of threading regarding inter and intra operator parallelism in a distributed database system. We review several well-known join techniques and evaluate them in multithreading environment using our prototype of distributed database system and a variety of workloads. The motivation for this study of the classical algorithms is the emergence of new equipment which became readily available and in particular multicore processors capable of running several threads concurrently.