I'm preparing new squid machine and I'm defining cache size. Old squid had 2 entries into "cache_dir directive" : cache_dir ufs /usr/local/cache/1 3500 128 256 cache_dir ufs /usr/local/cache/2 2500 128 256 My cache traffic volume (I/O) is about 2 Mbps a week with peaks of 3 Mbps. This squid cache is the parent of 2 other squid machines and it gives answers to about 1000 users. 1- I read you suggest 1 cache_dir to same partition, why I can't use 2 folder in tha same partition ?! 2- What do you think my caches size ? 3500 and 2550 ? and its directory structure (128,256) ?!