In the past we used multiple servers to load-balance the application and when we pushed updates to the application we would need to check it on all servers. But when it comes to VMware ThinApp we can do it on a file server or Isilon share and this helps cut costs and create a healthy environment. If we publish an application in Citrix through a server we should have more capacity. On multiple occasions, some applications need updates so at that point we need to disable the servers. But in this case there is no need for disabling user sessions, they can use it and we can do just gpupdate to update all servers in a row.
