>CARP is the type of hierarchy you want for scalability if SMP is unavailable. It is two-layer and each layer is independently scalable. .... It does require specific hardware ......< Why "specific HW" ( multi-core CPU will seriously benefit from this setup, although not a requirement) ? (I am running such a CARPed-squi2.7-config on a standard server with a quad-core CPU. Using separate disks for each squid, though, but that should not be a requirement either). > With SMP, if you have 2 processes, you can process 2 separate requests > simultaneously.> Same benefit when using CARP. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Same-cache-dir-for-many-squid-process-tp4660313p4660370.html Sent from the Squid - Users mailing list archive at Nabble.com.