Replacing Sitefinity Cache with Azure Redis
Sitefinity uses a In Memory cache. It is an implementation of the Enterprise Library Caching Application Block. This works fine but its a bit slack when in a multi server environment. You are effectively caching the same data on every server and thus, I think, a bit redundant. But you can create your own implementation of the CacheManger using the ICacheManager interface. I have done this and used the Azure Redis Cache, a leader in distributed cache systems.