Q: Is upgrading the operating system version on a server running StoreFront supported?

A: Upgrading the operating system version on a server running StoreFront is not supported. Citrix recommends that you install StoreFront on a new installation of the operating system. All the servers in a multiple server deployment must run the same operating system version with the same locale settings. StoreFront server groups containing mixtures of operating system versions and locales are not supported.

Citrix recommends a maximum of six servers in a server group. In case of more than six servers, the overhead of synchronizing data outweighs the benefit of the additional servers, and the performance is degraded. StoreFront server group deployments are only supported where links between servers in a server group have latency of less than 40 ms (with subscriptions disabled) or less than 3 ms (with subscriptions enabled).