Hi Rohit - let me see if I can get someone to assist.
jog - is this something you can address?
Rohit when applicable, please mark the appropriate replies as CORRECT. This will help community members and Qlik Employees know which discussions have already been addressed and have a possible known solution. Please mark threads as HELPFUL if the provided solution is helpful to the problem, but does not necessarily solve the indicated problem. You can mark multiple threads as HELPFUL if you feel additional info is useful to others.
Rohit, You can spread Qlik Components across different boxes to achieve a better resilience or scaling out to address increasing work load except the Repository and the share folder. In an HA configuration you need to avoid any single point of failure for this reason you want to get them out of any Qlik nodes and rely on different solutions e.g.
1) SAN (or NAS SMB 3 from Sept 2017) using some kind of RAID for the sharing folder
2) Postgres HA for the Repository
3) Rely on virtual solution such as VMWare HA
Hope this answers your question