Under the consolidation scenario in Clouds, the network dimension should be considered as important as the computing power of machines. Traditional consolidation procedure is usually made according to the experience, which mainly focused on the hardware capability of the target system, like CPU, Memory and etc. Along with the consolidation of the computing power, the network communication among machines is also consolidated. The consolidation procedure needs to cover this change and avoid network problems after moving the applications into target virtualized system. This paper presents a novel approach to provide optimization taking network traffic into account during consolidation.
[Show abstract][Hide abstract] ABSTRACT: This paper describes the design and implementation of a system that uses virtual machine technology (1) to provide fast, transparent application migration. This is the first system that can migrate unmodified applications on unmodified mainstream Intel x86-based operating system, including Microsoft Windows, Linux, Novell NetWare and others. Neither the application nor any clients communicating with the application can tell that the application has been migrated. Experimental measurements show that for a variety of workloads, application downtime caused by migration is less than a second.
Proceedings of the 2005 USENIX Annual Technical Conference, April 10-15, 2005, Anaheim, CA, USA; 01/2005
[Show abstract][Hide abstract] ABSTRACT: Cloud computing aims to power the next generation data centers and enables application service providers to lease data center capabilities for deploying applications depending on user QoS (Quality of Service) requirements. Cloud applications have different composition, configuration, and deployment requirements. Quantifying the performance of resource allocation policies and application scheduling algorithms at finer details in Cloud computing environments for different application and service models under varying load, energy performance (power consumption, heat dissipation), and system size is a challenging problem to tackle. To simplify this process, in this paper we propose CloudSim: an extensible simulation toolkit that enables modelling and simulation of Cloud computing environments. The CloudSim toolkit supports modelling and creation of one or more virtual machines (VMs) on a simulated node of a Data Center, jobs, and their mapping to suitable VMs. It also allows simulation of multiple Data Centers to enable a study on federation and associated policies for migration of VMs for reliability and automatic scaling of applications.
High Performance Computing & Simulation, 2009. HPCS '09. International Conference on; 07/2009
[Show abstract][Hide abstract] ABSTRACT: Due to the existence of multiple stakeholders with conflicting goals and policies, alterations to the existing Internet architecture are now limited to simple incremental updates; deployment of any new, radically different technology is next to impossible. To fend off this ossification, network virtualization has been propounded as a diversifying attribute of the future inter-networking paradigm. By introducing a plurality of heterogeneous network architectures cohabiting on a shared physical substrate, network virtualization promotes innovations and diversified applications. In this paper, we survey the existing technologies and a wide array of past and state-of-the-art projects on network virtualization followed by a discussion of major challenges in this area.
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