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— The key barrier to widespread uptake of cloud computing is the lack of trust in clouds by potential customers. While preventive controls for security and privacy are actively researched, there is still little focus on detective controls related to cloud accountability and auditability. The complexity resulting from large-scale virtualization and data(More)
This paper presents a formalization of the Web Service composition problem as a search problem in an AND/OR graph, and a search algorithm for searching the graph to identify composite service(s) that satisfies a Web Service request. Given a service request that only can be satisfied by a composition of Web Services, we identify the service categories that(More)
Making software systems service-oriented is becoming the practice, and an increasingly large number of service systems play important roles in today's business and industry. Currently, not enough attention has been paid to the issue of optimization of service systems. In this paper, we argue that the key elements to be considered in optimizing service(More)
enabled by a business-goal analysis, and customization enactment is enabled via event–condition–action rule inference. Our solution and framework have the following capabilities in dealing with inconsistencies and misalignments in business process interactions: 1) resolve semantic mismatch of process parameters; 2) handle behavioral mismatches which may or(More)
As Web services have become the grand vision these days, more and more people are seeking out the practicalities of implementing and using them for business benefit. Thus Web services make application functionality available over the Internet in a standardized, programmatic way. QoS support for Web service has become a widely researched area and has shown(More)
With the popularity of the Web services technology, more and more software systems' functionalities become available by being published and registered as Web services. Registered Web services need to be dynamically combined to form " composite services " when individual " simple services " fail to meet service requestors' complex service needs. In this(More)
Identifying similar Web services is becoming increasingly important to ensure the success of dynamically integrated Web-service-based applications. We propose a categorization-based scheme to match equivalent Web services that can operate on heterogeneous domain ontologies. Given the upper ontology for services and domain ontologies, our service matching(More)
Sustainable success of service oriented applications relies on capabilities to manage possible service failures. To substitute a failed service with some other equivalent service is unavoidable in recovering a suspended application due to failure of a constituent service. In this paper, we report a rule based approach to Web service substitution in order to(More)
Most of the work on cloud scalability has focused on the granularity of applications and systems deployed on the cloud and on how to adjust their resource assignment according to the scale or volume of the requests. In this paper, we present a scheme for improving the scalability of service-based applications in a cloud from the granularity of the(More)