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Fog computing has emerged as a promising solution for the Internet of Things (IoT) and next generation mobile networks. As an extension to cloud computing, it enables service provisioning along the continuum from the cloud to things for reducing latency and bandwidth demands, and for empowering end users in their vicinity. Specifically, fog computing can pool resources anywhere along this continuum...
Abstract-With the rapid development of streaming media, communications between Device-to-Device is becoming a magnetic solution to improve the performance of cellular network.Although numerous papers have been published in the past, most of them just focus on novel description but ignore the classical theory to be innovated. In this paper, inspired by BitTorrent protocol, we propose a dynamic d2d...
With the development of cloud storage, data owners no longer physically possess their data and thus how to ensure the integrity of their outsourced data becomes a challenging task. Several protocols have been proposed to audit cloud storage, all of which rely mainly on data block tags to check data integrity. However, their block tag constructions employ cryptographic operations, which makes them...
Anomalies of multitier services running in cloud platform can be caused by components of the same tenant or performance interference from other tenants. If the performance of a multitier service degrades, we need to find out the root causes precisely to recover the service as soon as possible. In this paper, we argue that cloud providers are in a better position than tenants to solve this problem,...
Cloud data center (CDC) network virtualization is being regarded as a promising technology to provide performance guarantee for cloud computing applications. One critical issue in CDC network virtualization technology is virtual data center (VDC) embedding, which deals with the CDC physical resource allocation to virtual nodes (virtual switches and virtual servers) and virtual links of a VDC. When...
In this paper, we describe DRS, a dynamic replica strategy based on improved Markov model for Hadoop Distributed File System (HDFS). DRS can dynamically increase or reduce the replicas with the data becoming hot or cold. It includes two parts: a dynamic replica adjustment strategy (DRAS) and a homogeneous replica placement strategy (HRPS). First, DRS constructs a transition probability matrix based...
We are currently in a big data era and raditional data management tools tends to be insufficient for massive multidimensional data processing and retrieval. In order to provide scalable multidimensional query processing capability to users, researchers have provided several techniques, e.g., MD-HBase. To help researchers have good understanding on current multidimensional indexing techniques and their...
The number of Web service in cloud environment is increasing explosively. These independent services can be integrated into value-added service through composition technology as long as their interfaces are subject to standard protocols. Now more and more services providing the same function but different in QoS are available in cloud, so service composition strategy is needed to obtain the optimal...
In recent years, cloud computing has developed rapidly under the vigorous promotion of industry and academia. With the expansion of cloud computing, users' special needs for cloud resources have gradually improved. As a business model, cloud computing must pay more attention to user demands for services and provide users with high-quality services. As one of the key technologies in cloud computing,...
To address the issue of internal network security, Software-Defined Network technology has been introduced to large-scale cloud centers, as it could not only improve network performance but also deal with network attacks. In order to prevent man-in-the-middle (MITM) and denial of service (DoS) attack caused by Address Resolution Protocol (ARP) bug in the cloud center, this paper proposed an algorithm...
In cloud storage centers, replica of file may be lost subjected to the failure of nodes, which will affect the efficiency of file access, as well as users' satisfaction. To cope with this problem, the method of redeploying the lost replicas on some other servers to maintain system availability is often adopted. Normally, a file is divided into many blocks with the same size and the popularity of the...
Virtualization technology and MapReduce program model are sharp swords for the big data and cloud computing era. The combination of them exhibits powerful ability of easy-management, fast-deployment, feasible-scalability and high-efficiency. However, the downside is that the performance is limited by the I/O bottleneck of Virtual Machine(VM). A huge number of data should be handled in MapReduce cluster...
MapReduce is an emerging program model in large-scale parallel applications while virtual machine environments are basic computing units in cloud computing. With advantages of these two rising technologies, we can build up a convenient parallel programming environment and make effective use of system resources in cloud computing. In this paper, we describe the effects of different virtualization technologies...
Currently, in cloud computing, the issue about how to get the higher QoS (quality of service) by the lower service cost is increasingly attracting the attention. In this paper, we study the system service cost and the task scheduling algorithms of the optimizing resource. Meanwhile, we consider the affecting factors, including the cloud service cost, node's load rate, bandwidth utilization, network...
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