Hi all, We?re medium sized ISP and want to implement caching. After doing some research, we decided to use load balancer with 4-5 servers. Our exiting gateway bandwidth is totally 300Mbps. After doing some calculations included in O?Reilly ?Web Caching ? we got to have a 2800GB of cache-dir and a huge amount of memory. The question is did I miscalculate? Or anyone has a better suggestion? The calculation specifics are: Bandwidth 300Mbps Total 80% of the bandwidth is HTTP Cache-hit: 40% Cache-miss: 60% Non-cacheable objects: 20% Any help is appreciated. Best Regards, Battsetseg. M Ph: 318115-0554 Mobicom Corporation