Combinatorial optimization: algorithms and complexity
Combinatorial optimization: algorithms and complexity
The Markov-modulated Poisson process (MMPP) cookbook
Performance Evaluation
A framework for scalable global IP-anycast (GIA)
Proceedings of the conference on Applications, Technologies, Architectures, and Protocols for Computer Communication
Application-layer anycasting: a server selection architecture and use in a replicated Web service
IEEE/ACM Transactions on Networking (TON)
An admission control scheme for predictable server response time for web accesses
Proceedings of the 10th international conference on World Wide Web
Enabling dynamic content caching for database-driven web sites
SIGMOD '01 Proceedings of the 2001 ACM SIGMOD international conference on Management of data
Preserving QoS of e-commerce sites through self-tuning: a performance model approach
Proceedings of the 3rd ACM conference on Electronic Commerce
Session-Based Admission Control: A Mechanism for Peak Load Management of Commercial Web Sites
IEEE Transactions on Computers
Admission control schemes guaranteeing customer QOS in commercial web sites
net-Con '02 Proceedings of the IFIP TC6 / WG6.2 & WG6.7 Conference on Network Control and Engineering for QoS, Security and Mobility
On admission control for profit maximization of networked service providers
WWW '03 Proceedings of the 12th international conference on World Wide Web
Content Distribution Networks: An Engineering Approach
Content Distribution Networks: An Engineering Approach
Content Distribution Architecture Using Network Layer Anycast
WIAPP '01 Proceedings of the Second IEEE Workshop on Internet Applications (wiapp '01)
Session Based Access Control in Content Delivery Networks in Presence of Congestion
QSHINE '04 Proceedings of the First International Conference on Quality of Service in Heterogeneous Wired/Wireless Networks
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Performance critical services over Internet often rely on geographically distributed architectures of replicated servers. Content Delivery Networks (CDN) are a typical example where service is based on a distributed architecture of replica servers to guarantee resource availability and proximity to final users. In such distributed systems, network links are not dedicated, and may be subject to external traffic. This brings up the need to develop access control policies that adapt to network load changing conditions. Further, Internet services are mainly session based, thus an access control support must take into account a proper differentiation of requests and perform session based decisions while considering the dynamic availability of resources due to external traffic.In this paper we introduce a distributed architecture with access control capabilities at session aware access points. We consider two types of services characterized by different patterns of resource consumption and priorities. We formulate a Markov Modulated Poisson Decision Process for access control that captures the heterogeneity of multimedia services and the variable availability of resources due to external traffic. The proposed model is optimized by means of stochastic analysis, showing the impact of external traffic on service quality. The structural properties of the optimal solutions are studied and considered as the basis for the formulation of heuristics. The performance of the proposed heuristics is studied by means of simulations, showing that in some typical scenario they perform close to the optimum.