@MISC{_abstractthe, author = {}, title = {Abstract The Effectiveness of Request Redirection on CDN Robustness}, year = {} }
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Abstract
It is becoming increasingly common to construct net-work services using redundant resources geographically distributed across the Internet. Content Distribution Net-works are a prime example. Such systems distribute client requests to an appropriate server based on a va-riety of factors---e.g., server load, network proximity, cache locality--in an effort to reduce response time and increase the system capacity under load. This paper ex-plores the design space of strategies employed to redi-rect requests, and defines a class of new algorithms that carefully balance load, locality, and proximity. We use large-scale detailed simulations to evaluate the various strategies. These simulations clearly demonstrate the ef-fectiveness of our new algorithms, which yield a 60-91% improvement in system capacity when compared with the best published CDN technology, yet user-perceived response latency remains low and the system scales well with the number of servers. 1