upgrade info
We are planning to upgrade our siebel environment from 8.0.x to latest 8.1.1.x(would like to upgrade to most recent), I would like to know couple of things and I am sure this is the best place to get the info
1. I would like to know if there are any major datamodel or schema changes like we had from 7.5 to 7.8 or 8
2. How long it takes to run the upgrade process, looking for some real time answers in this case, we will do a mock upgrade anyways but want to get some fair idea on the various steps involved for the upgrade