Cloud computing has become one of the hottest topics in the IT world today. Its model of computing as a resource has changed the landscape of computing as we know it, and its promises of increased flexibility, greater reliability, massive scalability, and decreased costs have enchanted businesses and individuals alike. Cloud computing, as defined by NIST, is a model for enabling always-on, conv...

Cloud computing becomes a well-adopted computing paradigm. With the unprecedented scalability and flexibility, the computational cloud is able to carry out large scale computing tasks in the parallel fashion. The datacenter cloud is a new cloud computing model that use multi-datacenter architectures for large scale massive data processing or computing. In datacenter cloud computing, the overall...

Keywords: Datacenter networks Valiant load balancing Full bandwidth communication Service availability Link failures Capacity allocation a b s t r a c t One critical challenge in datacenter network design is full bandwidth communication. Recent advances have enabled this communication paradigm based on the notion of Valiant load balancing (VLB). In this paper, we target full bandwidth communica...

Using multiple datacenters allows for higher availability, load balancing and reduced latency to customers of cloud services. To distribute multiple copies of data, cloud providers depend on inter-datacenter WANs that ought to be used efficiently considering their limited capacity and the ever-increasing data demands. In this paper, we focus on applications that transfer objects from one datace...

To improve data availability and reduce user access latency, geo-cloud based data replication is widely used in large global Web sites, such as Facebook. However, as the popularity of data is different and will change as time goes by, simple static replica creation strategies that assign the same number of replicas to all data, never changing thereafter, are not suitable. To this issue, we prop...

Cloud computing places an organization’s sensitive data in the control of a third party, introducing a significant level of risk on the privacy and security of the data. We propose a new management and security model for cloud computing called the Private Virtual Infrastructure (PVI) that shares the responsibility of security in cloud computing between the service provider and client, decreasin...

As cloud services grow to span more and more globally distributed datacenters, there is an increasingly urgent need for automated mechanisms to place application data across these datacenters. This placement must deal with business constraints such as WAN bandwidth costs and datacenter capacity limits, while also minimizing user-perceived latency. The task of placement is further complicated by...

We present CCM (Cloud Capacity Manager) – a prototype system, and, methods for dynamically multiplexing the compute capacity of cloud datacenters at scales of thousands of machines, for diverse workloads with variable demands. This enables mitigation of resource consumption hotspots and handling unanticipated demand surges, leading to improved resource availability for applications and better d...

With the exponential increase of the cloud business volume, Data center occurs load imbalance caused by some physical machine inefficiency due to the diversity of users requirements. Therefore the cloud datacenter need an appropriate algorithm to balance the PMs load and ensure the resource utilization in the cloud datacenter. The paper defines and formulates the problem parameters and proposes...