Clouds are a large volume of virtualized resources which are easy to use and access. It is a platform providing dynamic pool resources and virtualization. Based on a pay-as-you-go model, it enables hosting of pervasive applications from consumer, scientific and business domains. Cloud computing is the emerging internet based technology which emphasizes commercial computing. Cloud computing can be classified as a new paradigm for the dynamic provisioning of computing services supported by state-of-art data centers that usually employ virtual machine (VM) technologies for the consolidation and environment isolation purposes [1]. In this work, the comparison between the different cloud computing platforms such as Abicloud, Eucalyptus, XCP, Nimbus, OpenNebula, and Tplatform is presented. The basic principles are outlined of all the above mentioned platforms and the architectural tradeoffs of those platforms are discussed.
Cloud computing is a rapidly growing internet based computing that endeavors to be dynamic, reliable and available with guaranteed quality of service. This has become a sophisticated computing platform or technology for customers as well as organizations for its availability of resources such as software, storage and network with minimum cost. Using the business model like Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a service (IaaS) this environment have increased distribute computing capacity. Preserving confidentiality, integrity and availability are the vexing issues in cloud computing environment. This paper highlights cloud computing threats and proposes a distributed and efficient encryption algorithm to enhance the data security in cloud.
Cloud computing is an interesting topic which is applied in the field of parallel and distributed computing. Cloud computing systems can access to large pools of data and computational resources through a variety of interfaces. Services provided by clouds are high performance computing, storage and application hosting. According to types of visibility clouds are divided into three types like: public cloud, private cloud and hybrid cloud. In case of public cloud resources are provided dynamically where as in case of private cloud resources are provided on demand. Reliability of private cloud is more. Here the paper, provide a comparative study between CPU performance of public cloud and private cloud (e.g. mycloud) .
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