We are doing an in-place upgrade of SQL Server 2016 with SSIS & SSAS to SQL Server 2017.
Microsoft documentation shows the process. SQL Server part pretty straight forward but I got few questions about SSIS & SSAS as I don't know much knowledge about these Services.
SSIS
After upgrade, I will end up with 2 versions of SSIS Services (SSIS 13.0 and SSIS 14.0). Do I need to stop and disable the SSIS 13.0 ? or it needs to be remain place until the developers have upgraded the existing SSIS packages from 2016 to 2017 ?
The documentation says the packages will automatically get upgraded at run time (temporary) every time they are run. Does the SSIS packages automatically run under SSIS 14.0 after upgrade or I need to change something (like SSISDB compatibility or update package individually somewhere) before they can run and until then they will continue to run in SSIS 13.0 compatibility mode.
When can the SSIS 13.0 service stopped/disabled ?
Can it be removed (and how its uninstalled) or it shouldn't be removed ?
SSAS
Is there anything I need to do explicitly post upgrade from Administration/configuration level for SSAS?