Web Caching and Replication

11.4. Summary

Overall, a general consensus among vendors is that disk space is currently not the limiting factor in proxy performance. Therefore they never differentiate themselves based on replacement policies.

One can argue that cache replacement at a proxy will become more relevant once the proliferation of multimedia makes Web objects much larger. However, given the pace of change of the Web, today's studies of cache policies, based on today's Web behavior, will soon be irrelevant, because all studies depend heavily on the workload characteristics. For example, the LRU-threshold and LRU-minimum replacement policy, while increasing the hit rate of small objects, would discriminate against those large multimedia objects. Moreover, the computing ...