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- W2783241381 abstract "This paper presents a new concurrency control algorithm for parallel database systems with a shared-nothing architecture. The algorithm which is used in these systems is strict two phase locking s-2pl. The new algorithm, speculative two-phase locking sp-2pl, is an extension of s-2pl. Other concurrency control algorithms outperform s-2pl under certain system conditions, but in general s-2pl gives better results. Our proposal, sp-2pl, allows to advance some operations but always giving a serializable schedule. The compatibility lock modes of operatons have been extended, and so the system can advance some operations in a speculative behavior. This situation is very useful in parallel database systems because the network overhead of our proposal has minimum impact on a system based on a fast interconnection network or on a bus. Our performance studies also show that the sp-2pl gives a better behavioral patten than the s-2pl, maintaining the robustness of s-2pl" @default.
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- W2783241381 date "2001-01-01" @default.
- W2783241381 modified "2023-09-23" @default.
- W2783241381 title "Speculative two-phase locking algorithm for distributed database systems" @default.
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