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Improving the performance of I/O virtualization is a key issue for cloud and datacenter infrastructures, especially with the rapid increase of network interconnection speeds. Previous efforts have made the performance overhead associated with the virtual I/O data path largely negligible. The remaining bottlenecks mainly lie in the event path: hypervisor interventions trigger costly virtual machine...
In this paper, wavelet analysis methods, mainly including wavelet basis function, continuous and discrete wavelet transform and multiresolution analysis were introduced first. Then, current applications of the wavelet analysis methods to various aspects of cloud computing and big data were summarized. The three aspects of wavelet-based analysis include: The application of wavelet denoising, the online...
Symmetric Multi-Processing (SMP) virtual machine (VM), or virtual SMP for short, enables a single virtual machine to span multiple processors, thereby supporting the virtual machine to run resource-intensive applications. In addition to offering higher computing capacity, virtual SMP also offers the opportunity to alleviate the problem of unpredictable I/O responsiveness. To this end, we propose vINT...
Transoceanic video telephony (TVT) over the Internet is challenging due to 1) longer round-trip delay, 2) larger number of relay hops, and 3) higher packet loss rate. Real-world measurements of Skype, Face time, and QQ confirm that their TVT service quality is mostly unsatisfactory. Recently, when using We Chat to make transoceanic video calls, we are fortunate to find that it achieves stably smooth...
Cloud computing provides centralized data storage and online computing. For centralized data storage, to address both security and availability issue, distributed storage is an appealing option in that it can ensure file security without requiring data encryption. Instead of storing a file and its replications on multiple servers, we can break the file into components and store the components on multiple...
The cloud radio access network (C-RAN) is an emerging network architecture that holds the promise of coping with the explosive growth of mobile wireless data. In this paper, by considering the stochastic traffic arrivals and time-varying channel conditions, we address the stochastic optimization of joint remote radio head (RRH) activation and linear beamforming to maintain delay performance and minimize...
In this paper, we propose a platform named EmuCloud, aiming to provide a test environment for SDN with high fidelity and low cost. EmuCloud is based on IaaS cloud, and the key idea of the platform is to extend the abstract networking resources to provide virtual openflow switch, and combine this new abstraction with existing service (such as computing, storage, authentication, etc.) seamlessly. Compared...
Distributed storage plays a crucial role in the current cloud computing framework. After the theoretical bound for distributed storage was derived by the pioneer work of the regenerating code, Reed-Solomon code based regenerating codes were developed. The RS code based minimum storage regeneration code (RS-MSR) and the RS code based minimum bandwidth regeneration code (RS-MBR) can achieve the theoretical...
With continuous expansion of cloud computing, problems of third-party data security become increasingly prominent. However, effective retrieval of encrypted data and other operations are difficult to achieve by traditional cryptogram systems. Thus, a practical simple fully homomorphic encryption scheme, using only elementary modular arithmetic, derived from Gentry cryptosystem is put forward to ensure...
With the cloud computing becoming more and more popularity in both commercial and academic fields, platform-as-a Service (PaaS) becomes one of the core technologies for service provider to change the way of service-providing to both common users and scientific organization. This paper describes a business process oriented Platform-as-a-Service framework called BPPaaS including an integrated business...
Recently, several mobile services are changing to cloud-based mobile services with richer communications and higher flexibility. We present a new mobile cloud infrastructure that combines mobile devices and cloud services. This new infrastructure provides virtual mobile instances through cloud computing. To commercialize new services with this infrastructure, service providers should be aware of security...
In recent years large graph processing has emerged to be a popular application for companies because of the increasing large Web graph and social networks. The ever growing scale of graphs and recent emergence of cloud computing poses challenges to their efficient and cost-conscious scheduling approach for processing tasks. In this paper, we focus on the use of cloud resources for dispatching large...
Cloud computing which is regarded as the next revolution of science and technology is the development of distributed processing, parallel computing and grid computing. It is an Internet-based super computing model and is promoting the rapid development of mobile learning for its unique superiority as well. The paper summarizes the characteristics and models of traditional mobile learning, analyzes...
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