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Wireless community networks (CNs) are large-scale, self-organized and decentralized communication infrastructures built and operated by citizens for citizens. CN cloud infrastructures have been recently introduced to run services inside the network, without the need to consume them from the Internet. We have developed a Linux-based distribution code-named Cloudy, which fosters the service deployment...
Nowadays, there are several open-source solutions for building private, public and even hybrid clouds such as Eucalyptus, Apache Cloud Stack and Open Stack. KVM is one of the supported hypervisors for these cloud platforms. Different KVM configurations are being supplied by these platforms and, in some cases, a subset of CPU features are being presented to guest systems, providing a basic abstraction...
Cloud computing, the latest buzzwords in the technology sector, describes a new era of Internet usage when services are delivered over the Web. The present work proposes a new strategy to integrate cloud solutions to curb the rising IT costs, the complexity of network management, and infrastructure inefficiencies for IPTV. This new approach adopts two virtualization techniques: 1) server virtualization...
Video processing applications are notably data intense, time, and resource consuming. Upfront infrastructure investment is usually high, specially when dealing with applications where time-to- market is a crucial requirement, e.g., breaking news and journalism. Such infrastructures are often inefficient, because due to demand variations, resources may end up idle a good portion of the time. In this...
The advent of the Internet poses great challenges to the design of public submission systems as it eliminates traditional barriers, such as geographical location and costs associated to physical media and mailing, that helped keeping the number of submissions at bay. With open global access, it is very hard to estimate storage space and processing power required by this class of applications. In this...
Cloud Computing (CC) is characterized by dynamically scalable and often virtualized resources that are provided as a service over the Internet. To date, no generally agreed scheme for the internal organization of a cloud has emerged, and multiple approaches have been proposed, ranging from traditional N-tier to peer-to-peer ones. In this paper we illustrate our CC approach based on service mobility,...
Cloud computing offers the potential to dramatically reduce the cost of software services through the commoditization of information technology assets and on-demand usage patterns. However, the complexity of determining resource provision policies for applications in such complex environments introduces significant inefficiencies and has driven the emergence of a new class of infrastructure called...
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