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Virtualization technology has attracted wide attention in recent years as a method to improve resource utilization, reduce costs, and ease server management. However, the performance penalty resulting from virtualization is an unneglectable problem and should be carefully evaluated. To our knowledge, there are few performance evaluating tools developed for virtualization environments. We propose a...
In current virtualized cloud platforms, resource provisioning strategy is still a big challenge. Provisioning will gain low resource utilization based on peak workload, and provisioning based on average work loads will sacrifice the potential revenue of cloud customers because of bad user experiences. VM-based performance isolation also restrains resource flowing on demand. As to memory, this eventually...
Sortie generation rate (SGR) is a key factor of military aircraft's combat effectiveness. An approximate analytical method is presented to analyzing aircraft sortie generation process by modeling the process as a closed queuing network (CQN). Each station in the CQN provides a kind of service to aircraft. The service time of servers in a same station can be unequal. A modified mean value analysis...
This paper proposes an adaptive peer selection strategy in support of fast and fair peer-to-peer file sharing applications. According to specific features of peer duality, the system server is able to schedule download requests by degrees of peers' contributions, and correspondingly assign server peers in charge to process requests by degrees of peers' capacities. In addition, several functional extensions,...
Rapidly growing service delivery organizations need efficient tools to manage their business and reduce the cost of growth. These delivery businesses run round the clock due to demands coming from different geographical locations for different shifts. Cost of adding new physical infrastructure and space to tap incoming business is a key inhibitor of growth. Physical space availability and its effective...
A challenge that comes with server virtualization is how to effectively manage capacities of virtual machines to increase resource utilization while ensuring that the service level objectives (SLOs) of applications running on them should be satisfied. Migration is a good technique to address this challenge, which is transparent to the applications and supported by most of modern virtual machines....
With the development of virtualization technology, it??s desirable to deploy virtual machines to high performance clusters used for data centers. VNIX, developed in Services Computing Technology and System lab, tries to help cluster administrators to manage a large number of virtual machines (VMs) distributed on clusters. To reduce the complexity of virtualization management, VNIX provides a whole-set...
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