Hello,

we want to use CAS in a HA solution, so I had a look at http://www.ja-sig.org/wiki/display/CASUM/Clustering+CAS.

It describes three steps:
1.- Ticket Uniqueness
2.- Tomcat Session Replication
3.- Ticket Cache Replication

Steps 1 and 3 are clear. But for what scenario do I need step 2?
What CAS specific stuff in session state has to be replicated?
Isn't it enough to distribute the TGTs among the CAS servers to have a failover 
solution?

Or lets restate the question:  if I omit step 2, what can go wrong in case of 
failover to another server?

Thank you for your help, Ina

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