Access Control for CDN Assets

Abstract: This work presents a technique for implementing Copy-on-Write on top of a persistent storage. The method was developed from the needs of a se curity management system, but the technique and conclusions drawn are general enough to be applicable to any system with vaguely similar consistency requirements. The scalability of the security management system is tested and the technique is evaluated with load testing and model checking. The implementation is shown to be scalable for up to >6.000 simultaneous active users per node, but based on our experience a better solution is suggested in the conclusion.