How to keep a session on several servers

Hi everybody
Could anyboy tell me how to keep
a session created on a previous server and
maintained on any other server?
I heard something about cascading sessions

This sounds application server specific, which server are you using?

Hi,
I have also posted a query something similar to this. So please let me know in case if you find answer for your question. We are using Websphere application server and Jserv as webserver.
I will also let you know in case if i come to know any answer.
Thanks
Best Regards
Aruna G

Im pretty sure sessions, like cookies are server specific. I really dont think its possible to save them across different domains. This drops into the realm of security problems & if Im not mistaken this type of session behaviour isnt allowed due to the fact that if you could do it people would be trying to grab user info from other sites constantly.

The servlet2.2/3 spec does not define support for distributed sessions. It is definitely server specific at best. So don't expect your webapp to be portable. There are various articles out there describing tactics to realize this requirement. One on javaworld a while back was entitled "Distributed Sessions" and the method behhind it was using RMI to synch all of the sessions.
In short, there are no nice simple solutions, yet.