We are going to install the hotfix - http://support.microsoft.com/kb/2553031, would like to clarify few points.
- does the SharePoint & IIS services need to be stopped before installing?
- do need to follow any sequence like start with CA server, index, query, app & WFEs?
- shall we run parallelly on the servers?
- do we need to run the configuration wizard on the servers in the same sequence?
- does the system reboot required?
- does it change the DB schema?
- how to rollback if it does not installed successfully?
- is there any known issue with this hotfix?