The effectiveness of request redirection on CDN robustness

Limin Wang, Vivek Pai, Larry Peterson
<span title="2002-12-31">2002</span> <i title="Association for Computing Machinery (ACM)"> <a target="_blank" rel="noopener" href="" style="color: black;">ACM SIGOPS Operating Systems Review</a> </i> &nbsp;
It is becoming increasingly common to construct network services using redundant resources geographically distributed across the Internet. Content Distribution Networks are a prime example. Such systems distribute client requests to an appropriate server based on a variety 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 explores the design space of strategies employed to redirect
more &raquo; ... sts, 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 effectiveness 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.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.1145/844128.844160</a> <a target="_blank" rel="external noopener" href="">fatcat:fejh7rjzu5bidfjh2lr7dadf74</a> </span>
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