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A novel, generic, framework for supporting self-organisation and self-management in hierarchical systems is presented. The framework allows for the incorporation of local self-organising and self-managing strategies at each level in the hierarchy. These local strategies determine the behaviour of that level and the effects of these strategies can be communicated to, and used by, the strategies in...
This paper proposes the concept of a multi-service cloud of drones that provides services required by people in crowded open air places, such as Internet connectivity or access to emergency services. The cloud of drones has the benefit of resource replication and tackling scalability. At the same time, their number and operation can be controlled by the cloud to enhance reliability and provide greater...
In the new Digital Economy, massive computer systems, often grouped in datacenters, serve as factories "producing" cloud services with massive consumption. However, to afford cloud services globally, we must address new research challenges in designing, operating, and using modern datacenters. We must also address challenges in educating and training the next generation of datacenter engineers...
Although cloud computing greatly utilises virtualised environments for applications to be executed efficiently in low-cost hosting, it has turned energy wasting and overconsumption issues into major concerns. Cloud infrastructure is built on a great amount of server equipment, including high performance computing (HPC), and the servers are naturally prone to failures.In this paper, we report on an...
New technologies brought to life by the rapid growth in number of mobile devices are starting to be employed for creating cyberinfrastructures for smart cities. One such technology comes in the form of opportunistic networks (ONs), where mobile nodes only communicate between each other through protocols such as Bluetooth or Wi-Fi Direct. The usefulness of ONs in smart cities is high, because they...
In the past few years, datacenter (DC) energy consumption has become an important issue in technology world. Server consolidation using virtualization and virtual machine (VM) live migration allows cloud DCs to improve resource utilization and hence energy efficiency. In order to save energy, consolidation techniques try to turn off the idle servers, while because of workload fluctuations, these offline...
Cloud Services have become an important part of the business world. Although public cloud services provide a range of advantages, it also creates concerns over security, network usage and the need for technical expertise in the management of the cloud. This paper describes a local private cloud which uses on-site hardware infrastructure and which incorporates a three tier management system. This device...
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