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We propose an architecture that increases the resiliency against DDoS attacks by leveraging virtual network functions (VNF) and software defined networking (SDN). In the first step, the proposed architecture places the virtual network functions (VNF) optimally by solving a linear program. In the second step, in order to add preemptive protection against DDoS attacks, special filter VNFs and secondary...
A flash crowd is a situation in which a large number of users access a Web service simultaneously. Conventional methods for managing flash crowds include dropping of excessive requests, preparing of redundant servers, and dynamic provisioning of server resources. It is, however, difficult to use these methods to satisfy all the related requirements such as prevention of system down, avoidance of user...
Cloud bursting temporarily expands the capacity of cloud-based service hosted in a private data center by renting public data center capacity when the demand for capacity spikes. This paper presents a cloud bursting approach based on long- and short-term predictions of requests to a business-critical web system to determine the optimal resources of the system deployed over private and public data...
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