That's a good idea... but I must use memcached, as this code needs to run on a farm of webservers (each one pushing as much throughput as possible), with many memcached servers. This may be premature... but after reading the CGI::Session::Driver::memcached code, I believe, that in my case, it's unusable. It uses the sid as the key. This will fill up my 4G memcached space in no time. Since the sid is random, I won't have any practical method to age out sessions. I have already written my own driver to replace it. Thanks for your reply.