AT:

• write documenation in the optimize docs in the upgrade section of the technical guide:
  • what are the prerequisites
  • what to keep in mind when upgrade, e.g. to back-up the data before performing the upgrade
  • how to perform the upgrade
  • which files should be back-uped
  • where do I get the upgrade jars
  • how to adjust logging for the upgrade
  • typical errors and why the upgrade might fail, e.g. jar was executed in wrong path