Web Caching and Replication

9.1. Shared Cache: How Big Is Big Enough?

Much research effort has gone into enabling cooperation between different proxies. The underlying belief has been that the more clients that can share the cache, the better. In addition, early proxies were capable of processing only around fifty requests per second, so a central proxy often became a performance bottleneck. Great strides have since been made in improving proxy performance. The best-performing proxy in an independent evaluation conducted in 2000 [Rousskov et al. 2000] sold for around $51,000 and processed 2,400 requests per second. The best-performing proxy per dollar in the same study could process 1,450 requests per second for less than $15,000. According to Wolmann et al. [1999a], 23,000 ...