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Virtualization is essential in supporting today's information infrastructure, and in particular the Cloud Computing area. However, the move to a virtualized architecture implies the addition of a new single point of failure: the hypervisor. Attempts to characterize and compare the susceptibility of systems (including virtualized systems) are often limited to the study of failure modes and their probabilities...
Virtualization is a key technology in research fields such as cloud computing, big data and new networks. A lot of cloud computing platforms, data centers, intranets and test environments of networks developed in recent years all depend on virtualization. Virtualization technology has become a hot research focus in computer industry because of its flexibility and wide application. By analyzing the...
Virtualization is growing rapidly as a result of the increasing number of alternative solutions in this area, and of the wide range of application field. Until now, hypervisor-based virtualization has been the de facto solution to perform server virtualization. Recently, container-based virtualization -- an alternative to hypervisors -- has gained more attention because of lightweight characteristics,...
Virtualization theory is well known and successfully used in the computer domain. Personal computer (PC) workstations, as well as their virtual counterparts, are popular for general purposes. PC stations are also popular in networked control systems (NCSs). They are used as system components to deliver user interfaces and to run many important services of the data processing, communication, and database...
As a dynamic memory virtualization technique, ballooning is widely applied in many virtualization platforms, i.e. Xen and VMware ESX Server. Since ballooning technology enables the guest OS to surrender unused memory back to the host during runtime, and it can increase utilization and flexibility of memory. Despite the rapid development and extensive use of memory virtualization technologies, it is...
Many cloud computing platforms adopt visualization technology to provide cloud services. To achieve high computing performance, many data parallel frameworks are adopted to run the jobs. The job is broken into pieces and farmed out to virtual machines (VMs) to process in parallel. The responses from these VMs are aggregated to produce the final result with concurrent flows. However, the concurrent...
Recently, HPC in the Cloud has emerged as a new paradigm in the field of parallel computing. Most of cloud systems deploy virtual machines for provisioning resources. However, in a virtual machine environment, there is still no mature method to analyze performance of MPI parallel programs. In this paper, we propose a series of innovative methods for performance analysis of MPI parallel programs on...
Virtualization is the fundamental technology for corporate data center consolidation and cloud computing. Companies and academic institutions consolidate their servers through virtualization in search for efficient hardware resource usage, lower energy consumption, improved fault tolerance, and increased security. In this paper, we investigate the performance and scalability of two open source virtualization...
This paper researches and analyses the model of virtualization in the current trend of cloud computing technology and management mechanism of Para virtualization based on Xen according to the characteristics of virtualization. In this mode, we analyses the I/O scheduler's result which impacts for the entire cluster system in the virtual machines and Drawing out Visualize formula, which provides Method...
In this paper we present three virtualization devices (Xen server, NetFPGA and EZ appliance) which have been used for implementation of data plane functionality in a Future Internet architecture, the IIP System. We give general description of these devices and present implementation of the IIP System node on each device.
Cloud Computing is a powerful and flexible software environment, which delegates the material's management and in which users pay as they go. The migration of enterprise applications on the Cloud is increasing. Most of these applications are available with a standardized access to the business logic through Internet. However, the current cloud offers is not always complying with users' needs. For...
Sequential or single-threaded programming is already a complicated task. The shift to multithreaded programming only increases complexity, cost and code of the program and moreover increases the effort required for debugging, to avoid deadlocks, race conditions and other problems associated with the parallel programs. In this paper we present a comprehensive evaluation methodology to benchmark the...
Many advanced hardware accelerations for virtualization, such as Pause Loop Exit (PLE), Extended Page Table (EPT), and Single Root I/O Virtualization (SR-IOV), have been introduced recently to improve the virtualization performance and scalability. In this paper, we share our experience with the performance and scalability issues of virtualization, especially those brought by the modern, multi-core...
Virtualization technology is currently widely used due to its benefits on high resource utilization, flexible manageability and powerful system security. However, its use for high performance computing (HPC) is still not popular due to the unclearness of the virtualization overheads. It's worthy to evaluate the virtualization cost and to find the performance bottleneck when running HPC applications...
Virtualization enables multiple guest operating systems run on a single physical platform. These virtual machines may host any types of application, including concurrent HPC programs. Traditionally, VMM schedulers have focused on fairly sharing the processor resources among domains, rarely consider VCPUs' behaviors. However, this can result in poor application performance to overcommitted domains...
Embedded platforms are becoming increasingly more resource-rich (e.g. processing speeds, number of cores, memory, and communication rates). As a result, they are being transformed from `closed', fixed-function devices to programmable and flexible platforms capable of supporting diverse types of services. One approach to enabling service diversity jointly with proper isolation of key critical functionality...
Virtualization has fundamentally changed the data center network. The last hop of the network is no longer handled by a physical network switch, but rather is typically performed in software inside the server to switch among virtual machines hosted by that server. In this paper, we present the concept of a sNICh, which is a combination of a network interface card and switching accelerator for modern...
Virtualization poses new challenges to I/O performance. The single-root I/O virtualization (SR-IOV) standard allows an I/O device to be shared by multiple Virtual Machines (VMs), without losing runtime performance. We propose a generic virtualization architecture for SR-IOV devices, which can be implemented on multiple Virtual Machine Monitors (VMMs). With the support of our architecture, the SR-IOV...
With its growth and wide applications, virtualization has come through a revival in computer system community. Virtualization offers a lot of benefits including flexibility, security, ease to configuration and management, reduction of cost and so forth, but at the same time it also brings a certain degree of performance overhead. Furthermore, virtual machine monitor (VMM) is the core component of...
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