Technical Report CS0416

TR#:CS0416
Class:CS
Title: The Virtues of Locking by Sxmbolic Names
Authors: Ouri Wolfson
PDFCS0416.pdf
Abstract: We Propose an algorithm for improving the concurrency of two phase locked transaction systems, which use symbolic-name locking. The algorithm determines by preanalysis which entities can be unlocked before all locks have been obtained, without compromising serilalizability. This extends tile work we published in [12], in three ways. First, the transactions are not restricted to exclusive locks, and may use shared locks as well. Second, a method is proposed to prevent the potential problem of cascading restarts, which results from unlocking of entities before commitment. Third, the transactions may be designed for a distributed database.
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