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Several relaxed variants of Snapshot Isolation (SI) have been proposed for improved performance in distributed transactional key-value stores. These relaxed variants, however, provide no specification or control of the severity of the anomalies with respect to SI. They have also been designed to be used statically throughout the whole system life cycle. To overcome these drawbacks, we propose the...
Dynamic software updating (DSU) can upgrade arunning program on-the-fly by directly replacing the in-memorycode and reusing existing runtime state (e.g., heap objects) forthe updated execution. Additionally, it is usually necessary totransform the runtime state into a proper new state to avoidinconsistencies that arise during runtime states reuse amongdifferent versions of a program. However, such...
Privacy is an increasingly cited concept in the large-scale deployment of web services in pervasive computing. The necessity of putting data-owners' personal information online and unwanted intentions to access data-owners' information augment the risk of privacy disclosure. To address this problem, we propose a policy-based privacy protection mechanism that protects personal information by policy...
Source code coupling and change history are two important data sources for change coupling analysis. The popularity of public open source projects in recent years makes both sources available. Based on our previous research, in this paper, we inspect different dimensions of software changes including change significance or source code dependency levels, extract a set of features from the two sources...
Facing changing environments and evolving business rules, composite services ought to be adaptable, even at run-time. Existing mainstream service composition languages and execution engines exhibit insufficient support for variability and adaptability to cater for dynamic changes. Research efforts have been put on the extension of the languages and argumentation of the engines. However, how to ensure...
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