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When making reservations for Cloud services, consumers and providers need to establish service-level agreements through negotiation. Whereas it is essential for both a consumer and a provider to reach an agreement on the price of a service and when to use the service, to date, there is little or no negotiation support for both price and time-slot(More)
As various consumers tend to use personalized Cloud services, Service Level Agreements (SLAs) emerge as a key aspect in Cloud and Utility computing. The objectives of this doctoral research are 1) to support a flexible establishment of SLAs that enhances the utility of SLAs for both providers and consumers, and 2) to manage Cloud resources to prevent SLA(More)
In cloud computing, a cloud management platform need to deal with three main aspects of the system: price, service performance, and resource utilization. They want to maximize profit while guaranteeing service performance agreed upon service level agreement (SLA), and increasing resource utilization. These multiple objectives of a cloud provider are(More)
The number of cloud service users has increased worldwide, and cloud service providers have been deploying and operating data centers to serve the globally distributed cloud users. The resource capacity of a data center is limited, so distributing the load to global data centers will be effective in providing stable services. Another issue in cloud(More)
A negotiation mechanism is essential to establish a service level agreement between Cloud participants who need to resolve different preferences of a Cloud service. Whereas there are some mechanisms for supporting service level agreement negotiation, there is little or no negotiation support of price, time slot, and QoS issues concurrently for a Cloud(More)
Since participants in a Cloud may be independent bodies, some mechanisms are necessary for resolving the different preferences to establish a service-level agreement (SLA) for Cloud service reservations. Whereas there are some mechanisms for supporting SLA negotiation, there is little or no negotiation support involving price, time slot, and QoS issues(More)
Cloud broker concept is considered as one of solutions for federating distributed multi-Cloud. In order to design and realize a Cloud brokerage system, we need to devise establishment and management of SLA (Service Level Agreement). Whereas a SLA negotiation in a Cloud is assumed to be a basic functionality to establish a SLA, there has been some lack of(More)
As the number of users of cloud services increase all over the world, cloud service providers keep deploying geographically distributed data centers more. Since resource capacity of a data center is limited, cloud service providers need to distribute load to data centers. However, when the provider distributes load, SLAs (service level agreements)(More)
With HPC (high performance computing) and scientific computing, it has been possible to produce a large amount of data. To easily analyze those data and collaborate on it, visualization in terms of ultra high resolution is desired. However, in order to combine a HPC system with a high resolution display system, high system resource is required. This paper(More)