This illustration depicts what happens when a cluster member receives a request for cacheable content.

In this case, cluster member cache_Y receives the request, but it does not have the content cached and it is not the owner of the requested content. Because cache_Y cannot contact the owner (because of network problems or because the server for the owner has failed), it sends the request to the application Web server. The application Web server returns the requested content to cache_Y. Then, cache_Y returns the requested content to the client and stores the content as on-demand content.