My ISP? 5 racks in 32 cities as POP. Each POP had 10 Sun Netra T1 1RU boxes behind SLB. All those were a service cache to offload the main DC which had...hum..

My ISP? 5 racks in 32 cities as POP. Each POP had 10 Sun Netra T1 1RU boxes behind SLB. All those were a service cache to offload the main DC which had...hum... ~100 or so Sun E450 (4x480Mhz Usparc3, 4GB RAM, 20x4GB or 9GB UltraSCSI3 drives, 2x1G NICs). There was a cluster filesystem also. We had huge databases, etc. This is just not that hard today.