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Efficient optimistic concurrency control for mobile real-time transactions in a wireless data broadcast environment

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3 Author(s)
Li Guohui ; Sch. of Comput. Sci. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China ; Yang Bing ; Chen Jixiong

In this paper, we introduce a variant of the optimistic concurrency control protocols. The broadcast cycle is divided into multiple sub-cycles. Between two sub-cycles, there is a reserved space to accomodate identities for all the data objects which are updated by transactions in the server after the first sub-cycle begins. A read-only mobile transaction can validate its consistency autonomously by comparing its read-set with the committed write-set of the update transactions. If a read-only transaction cannot pass the partial validation, it is not simply aborted and restarted. Instead, an enhanced forward validation policy is applied, which help read-only transactions have more chances to commit. Extensive experiments are conducted to evaluate the performance of the proposed algorithms.

Published in:

Embedded and Real-Time Computing Systems and Applications, 2005. Proceedings. 11th IEEE International Conference on

Date of Conference:

17-19 Aug. 2005

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