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Service Clouds are a key emerging feature of the Future Internet which will provide a platform to execute virtualized services. To effectively operate a service cloud there needs to be a monitoring system which provides data on the actual usage and changes in resources of the cloud and of the services running in the cloud. We present the main aspects of(More)
Cloud computing [23] is a promising paradigm for the provisioning of IT services. Cloud computing infrastructures, such as those offered by the RESERVOIR project, aim to facilitate the deployment, management and execution of services across multiple physical locations in a seamless manner. In order for service providers to meet their quality of service(More)
The grid community has been migrating towards service-oriented architectures as a means of exposing and interacting with computational resources across organizational boundaries. The adoption of Web Service standards provides us with an increased level of manageability, extensibility and interoperability between loosely coupled services that is crucial to(More)
Cloud computing is changing the way in which companies deploy and operate ICT based services. This paradigm introduces several advantages compared with traditional data centers, such as a great degree of flexibility, pay-per-use models, and rapid resource provisioning. However, the lack of a well defined supply chain for clouds and an associated information(More)
In this article we describe the eMinerals mini grid, which is now running in production mode. This is an integration of both compute and data components, the former build upon Condor, PBS and the functionality of Globus v2, and the latter being based on the combined use of the Storage Resource Broker and the CCLRC data portal. We describe how we have(More)
— The integration of clusters of computers into computational grids has recently gained the attention of many computational scientists. While considerable progress has been made in building middleware and workflow tools that facilitate the sharing of compute resources, little attention has been paid to grid scheduling and load balancing techniques to reduce(More)
This paper describes a prototype grid infrastructure, called the " eMinerals minigrid " , for molecular simulation scientists. which is based on an integration of shared compute and data resources. We describe the key components, namely the use of Condor pools, Linux/Unix clusters with PBS and IBM's LoadLeveller job handling tools, the use of Globus for(More)
In order for existing grid middleware to remain viable it is important to investigate their potential for integration with emerging grid standards and architectural schemes. The Open Grid Services Architecture (OGSA), developed by the Globus Alliance and based on standard XML-based web services technology, was the first attempt to identify the architectural(More)
We present a case study of our experience re-engineering a scientific application using the Open Grid Services Architecture (OGSA), a new specification for developing Grid applications using web service technologies such as WSDL and SOAP. During the last decade, UCL's Chemistry department has developed a computational approach for predicting the crystal(More)