Abstract
Web services oriented computing is a hot topic for many e-commerce applications recently. It dramatically speeds up the application process and becomes more agile in responding to changing business needs. In this paper, we study the concurrency control problems among interleaved transactions for web services oriented e-commerce. We propose a new method called two-phase locking with adjustable slack time (2PL-AST) based on a high priority mechanism, which resolves the concurrent data access for both real-time and non-real-time support operations. The design issue aims to meet the deadline requirements of real-time transactions and minimize the response time of non-real-time transactions in the web services family at the same time. Experiments are conducted to evaluate the performance under different concurrency control protocols.
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