Need for Azure File storage and Redis Cache

• We are used to In-memory cache for session state or used to store local files to serve as temp files.In azure we cannot rely on this, the reason ,when we use azure platform as a service we would not have single dedicated server. 
• Resources are abstracted using Azure service fabric.This would take care of the web application running. Even if one of the data center fails, it would magically move to a different data center. This would make sure that our web applications are always running

       In memory cache and local files has to be shifted to Azure local File Storage or Redis cache