Modern control engineering (3rd ed.)
Modern control engineering (3rd ed.)
Dynamic behavior of differential pricing and quality of service options for the Internet
Proceedings of the first international conference on Information and computation economies
Fluid-based analysis of a network of AQM routers supporting TCP flows with an application to RED
Proceedings of the conference on Applications, Technologies, Architectures, and Protocols for Computer Communication
Business-oriented resource management policies for e-commerce servers
Performance Evaluation - Special issue on internet performance modelling
On maximizing service-level-agreement profits
Proceedings of the 3rd ACM conference on Electronic Commerce
Preserving QoS of e-commerce sites through self-tuning: a performance model approach
Proceedings of the 3rd ACM conference on Electronic Commerce
Feedback Control of Dynamic Systems
Feedback Control of Dynamic Systems
Fuzzy Control
Performance specifications and metrics for adaptive real-time systems
RTSS'10 Proceedings of the 21st IEEE conference on Real-time systems symposium
Fuzzy control of arrivals to tandem queues with two stations
IEEE Transactions on Fuzzy Systems
Optimizing Quality of Service Using Fuzzy Control
DSOM '02 Proceedings of the 13th IFIP/IEEE International Workshop on Distributed Systems: Operations and Management: Management Technologies for E-Commerce and E-Business Applications
Triage: Performance differentiation for storage systems using adaptive control
ACM Transactions on Storage (TOS)
eQoS: Provisioning of Client-Perceived End-to-End QoS Guarantees in Web Servers
IEEE Transactions on Computers
Consistent proportional delay differentiation: A fuzzy control approach
Computer Networks: The International Journal of Computer and Telecommunications Networking
Real-Time Robust Adaptive Modeling and Scheduling for an Electronic Commerce Server
EC-Web 2009 Proceedings of the 10th International Conference on E-Commerce and Web Technologies
A fuzzy grid-QoS framework for obtaining higher grid resources availability
GPC'08 Proceedings of the 3rd international conference on Advances in grid and pervasive computing
Robust fuzzy CPU utilization control for dynamic workloads
Journal of Systems and Software
Adaptive policies in information lifecycle management
DEXA'06 Proceedings of the 17th international conference on Database and Expert Systems Applications
Differences between t-norms in fuzzy control
International Journal of Intelligent Systems
Fuzzy Allocation of Fine-Grained Compute Resources for Grid Data Streaming Applications
International Journal of Grid and High Performance Computing
Reconfigurable hardware for fuzzy controller
International Journal of High Performance Systems Architecture
A fuzzy Grid-QoS framework for obtaining higher grid resources availability
The Journal of Supercomputing
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The growth of e-commerce is creating demand for services with financial incentives for service providers. Such services are specified by service level agreements (SLAs) in which revenue accrues with the number of completed transactions, and costs are incurred if response times go above a specified threshold. In this paper we propose a profit-oriented feedback control system that automates the admission control decisions in a way that balances the loss of revenue due to rejected work against the penalties incurred if admitted work has excessive response times. One approach to making these trade-offs is to employ classical control theory (e.g., proportional integral controllers); however, doing so requires a labor-intensive design process that tailors the controller to a specific workload and profit model. Instead, we develop a fuzzy control algorithm that implements hill climbing logic to maximize profits and handle the stochastics that make profits quite "bumpy." Our studies of a Lotus Notes® e-mail server reveal that the fuzzy controller requires little human intervention and is robust to changes in workloads and values of SLA parameters. Further, we prove that our design of the fuzzy controller leads to a value of the admission control parameter that maximizes steady state profits.