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In a Non Uniform Memory Access (NUMA) system, I/O to a local device is more efficient than I/O to a remote device. A device connected to the same socket having the CPU and memory offers a closer proximity for I/O operations. Modern microprocessors also support on-chip I/O interconnects with which the processor may drive I/O to a local device from the processor cache, without the need to interact with...
Cloud computing has emerged to provide infrastructure for cost-effectively hosting applications with dynamically changing demands for computational resources. Dynamic resource allocation in cloud computing is made possible through virtualization technologies. In addition, live migration of services hosted in virtual machines (VMs) among multiple data centers is expected to add more flexibility in...
CORE (Common Open Research Emulator) is a network emulation tool that uses virtualization provided by FreeBSD jails, Linux OpenVZ containers, and Linux namespaces containers. Here the modular architecture is described that makes supporting these three platforms possible, and the relative performance of each is compared. Initial work in integrating this tool with higher-fidelity link- and physical-...
Virtualization is a key technology for cloud based data centers to implement the vision of infrastructure as a service (IaaS) and to promote effective server consolidation and application consolidation. However, current implementation of virtual machine monitor does not provide sufficient performance isolation to guarantee the effectiveness of resource sharing, especially when the applications running...
Virtualization technologies can improve IT resource utilization and increase the flexibility needed to adapt to changing requirements and workloads. And, standard-based management enables a more integrated and cost effective development of the interoperable management solutions. With standard-based virtual infrastructure management, virtualization technologies in the distributed and heterogeneous...
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