"The hardware requirements are not as large as you would think. The most important aspect to consider is the RAM that is available for Squid. RAM is important because each object in the cache requires a small amount of memory. Generally, 32 MB of RAM are required for every GB of disk space. If you run out of memory there will be a significant reduction in speed.
"The other major consideration for Squid is disks. The faster the disk read and write the faster Squid will operate. Usually it is a good idea to consider SCSI for disks on a proxy server just because of speed. The other advantage that SCSI has is that it can access 7 different drives allowing for multiple reads and writes without a slowdown in access."
