Emergence of multi-core servers and the need for green computing has necessitated the resurgence of system virtualization. System virtualization has re-emerged as an answer to many critical issues being faced by the enterprise computing infrastructure. The issues that virtualization addresses are myriad, with the most popular one being server consolidation. Server consolidation deals with the p...

In recent years, there have been a number of papers comparing the performance of different virtualization environments for x86 such as Xen, VMware and UML. These comparisons have focused on quantifying the overhead of virtualization for one VM compared to a base OS. In addition, researchers have examined the performance degradation experienced when multiple VMs are running the same workload. Th...

Virtualization has rapidly become a go-to technology for increasing efficiency in the data center. With virtualization technologies providing tremendous flexibility, even disparate architectures may be deployed on a single machine without interference. Awareness of limitations and requirements of physical hosts to be used for virtualization is important. This paper reviews the present virtualiz...

Virtualization is not a new technology, but has recently experienced a resurgence of interest among industry and research. New products and technologies are emerging quickly, and are being deployed with little considerations to security concerns. It is vital to understand that virtualization does not improve security by default. Hence, any aspect of virtualization needs to undergo constant secu...

Graphics Processing Unit (GPU) virtualization is an enabling technology in emerging virtualization scenarios. Unfortunately, existing GPU virtualization approaches are still suboptimal in performance and full feature support. This paper introduces gVirt, a product level GPU virtualization implementation with: 1) full GPU virtualization running native graphics driver in guest, and 2) mediated pa...

Over the past years the use of digital devices has increased heavily, and home networks continue to grow in size and complexity. By the use of virtualized residential gateways, advanced functionality can be moved away from the home and thereby decrease the administrative burden for the home user. Using virtualizing residential gateways instead of physical devices creates new challenges. This pr...

Multiprocessor virtual machines (VMs) allow guest operating systems to use symmetric multiprocessing (SMP) in a VM. However, the use of SMP in a VM complicates CPU scheduling by the virtual machine monitor and can significantly increase the performance overhead of virtualization. This paper analyzes the performance of SMP virtualization used in two leading virtualization systems: VMware ESX 3.5...

Virtualized environments can make forensics investigation more difficult. Technological advances in virtualization tools essentially make removable media a PC that can be carried around in a pocket or around a neck. Running operating systems and applications this way leaves very little trace on the host system. This paper will explore all the newest methods for virtualized environments and the ...

A scalable approach to building large scale experimentation testbeds involves multiplexing the system resources for better utilization. Virtualization provides a convenient means of sharing testbed resources among experimenters. The degree of programmability and isolation achieved with such a setup is largely dependent on the type of technology used for virtualization. We consider OpenVZ and Us...

Virtualization technology has recently matured to the point where it can be used dependably on a daily basis by anyone. Computer virtualization is the idea of running virtual computer(s) inside of a physical host computer. The basic idea behind the technology is not difficult to understand, but understanding how the technology is implemented is more complicated. In this paper, the basic ideas b...