Will a Shared cache_dir? Will it be possible to use shared cache_dir or some share backend like a DB with squid?

[Eliezer Croitoru <eliezer@xxxxxxxxxxxx>]

I have been wondering about the need of a shared cache_dir.
In squid the development of a cluster is kind of uses ICP and HTCP to 
dispose the need of a shared cache_dir by using a\the cluster as a 
backend for the whole data.

If someone have a nice idea\example to demonstrate it I am looking for one.

Eliezer