We are on 4.0 SP2 patch 9 ,
our prod environment is having 6 nodes where Bi platform is installed
and 2 nodes where tomcat is installed
platform is on windows 2008 r2 server
and tomcat is on RHEL
all are on vmware
so when we want to apply patch,
1.can we do a simultaneous install of patch on all the nodes at a time
2.As this is on vm's the uninstall and install of the patch takes atleast 2 hours.
so when i kick in an install or uninstall after few minutes it will bring down the SIA on that server
and brings it back up at the end of the installation.
so is there any chance when i kick patch install at same time it might take any cms in the cluster and bring that one down,
and at the same time other patch install also looking for the same cms will wont have cms available in the process.
3.or patch install take local cms as priority and ingnore other cms in cluster
4.For install and uninstall what does it look from cms db before starting installation.
5.what actually a patch install and uninstall will write to CMS db