Virtualized data center infrastructures demand a solid foundation that delivers scale, resilience, flexibility and efficiency. Hitachi and Cisco, today’s leading advocates of data center infrastructure virtualization, have teamed to develop a blueprint for large-scale data center virtualization that satisfies these demands. Hitachi Unified Compute Platform (UCP) Select for VMware vSphere with C...

INTRODUCTION THE amount of data handled within companies has been growing rapidly in recent years against a background in which increased use is being made of documents, images, video, and other forms of unstructured data. Steps are needed to cope with these data volumes, which are set to keep on increasing. Moreover, with the economic recession driving down IT (information technology) budgets,...

Traditional data-centers are giving way to virtualization based shared hosting platforms. This requires knowledge of how much resources are required to host a set of virtualized services. Due to the resource overhead incurred by virtualization, it is essential to estimate the virtual resource usage correctly, in order to avoid inefficiency due to excessive provisioning as well as prevent perfor...

The increasing popularity of Cloud Computing is leading to the emergence of large virtualized data centers hosting increasingly complex and dynamic IT systems and services. Over the past decade, the efficient sharing of computational resources through virtualization has been subject to intensive research, while network management in cloud data centers has received less attention. A variety of n...

The advantages of always available services, such as remote device backup or data storage, have helped the widespread adoption of cloud computing. However, cloud computing services challenge the traditional boundary between trusted inside and untrusted outside. A consumer’s data and applications are no longer in premises, fundamentally changing the scope of an insider threat. This thesis looks ...

Virtualization plays a major role in helping the organizations to reduce the operational cost, and still ensuring improved efficiency, better utilization and flexibility of existing hardware. "Virtualization is both an opportunity and a threat says Patrick Lin, Senior director of Product Management for VMware" [4]. This paper presents a literature study on various security issues in virtualizat...

In this paper, we propose and implementVirtual Network Service (VNS), a value-added network service for deploying virtual private networks (VPN) in a managed wide area IP network. The key feature of VNS is its capability of providing a customer with a VPN that is customizable with management capabilities and performance properties comparable to a dedicated physical network. In addition, VNS ens...

Virtualization basically means realizing several runtime environments in parallel but strictly isolated on a shared hardware. Nowadays, virtualization is an accepted standard and is used in the desktop and server market as a genuine alternative solution to several individual dedicated hardware systems. Through today’s availability of modern and highly efficient virtualization solutions, virtual...

In recent years, there has been a rapid growth in the adoption of virtual machine technology in data centers and cluster environments. This trend towards server virtualization is driven by two main factors: the savings in hardware cost that can be achieved through the use of virtualization, and the increased flexibility in the management of hardware resources in a cluster environment. An import...