Ian Stuart wrote: > Doesn't the proxy do a write-to-disk as the page passes through? > Particularly with proxy-pass and proxy-passreverse? Well, if you're using disc-based cacheing (with mod_cache) then yes. But the proxy as such doesn't (why should it?) > This would imply that there is a process load on the server (limiting > the number of simultanious connections - but not an httpd/proxy limit > per-sae) *as well as* a disk-limit (for the I/O) The purpose of cacheing is to avoid the overhead of repeatedly fetching the same document from a backend. In a reverse proxy, backends can be further optimised using connection pooling with HTTP keepalive. -- Nick Kew --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx