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Web services are popular in terms of distributed technology that can successfully solve integration problems between heterogeneous systems. However, web service composition workflows are modeled using BPEL, BPEL4WS, and other programming languages which are difficult and very complex to use. To overcome this problem, a well known and simple modeling language such as Unified Modeling Language (UML)...
For organizations with mission critical systems, moving data or functionality to the cloud introduces a risk of additional exposed vulnerabilities associated with cloud service providers not implementing organizationally selected security controls. When internal system details are abstracted away as part of the cloud architecture, the organization must rely on contractual obligations embedded in service...
In this paper, we describe three major issues on supporting public cloud virtual machine such as the global scale. First is a heterogeneous provisioning issue. The kinds of operation systems that users require are various like as the required hardware performance diversity. Second, we propose a proper algorithm for guarantee about user's performance and efficiency of the cloud cluster resources together...
Shared data centers and clouds are gaining popularity because of their ability to reduce costs by increasing the utilization of server farms. In a shared server environment, a careful assignment of workload streams (all work-requests from a customer may constitute a stream) to servers is necessary to ensure good “end user” performance. In this work, we investigate the assignment of streams to servers...
Cloud computing has aroused wide research interests and has been accepted by industry. Services are playing the essential role in cloud computing as cloud computing refers to “both the applications delivered as services over the Internet and the hardware and systems software in the datacenters that provide those services”. Therefore, service-oriented architecture should play an important role in cloud...
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