How to Upgrade from ArcSight 4.5 to 6
it's pretty simple to answer actually:
a) Take ArcSight professional Services
b) Let the 4.5 and the new 6.0 System run parallel and the Connector dualfeed for atleast your Online Retention period
Just a rough overview, do your business case and see what is cheaper in the end.
5.5 and below is intended for those who have Oracle database Installation. 6.0 is CORR Engine Only. You cannot upgrade to 6.0. You will be able to migrate your uses cases but your data cannot be migrated.