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 the requested content is not stored in the owner's cache, the owner, cache_Z, sends the request to the application Web server. The application Web server returns the requested content to the owner. The owner caches the content and sends the requested content to the cluster member (cache_Y) that originally received the request. Cache_Y returns the requested content to the client and stores the content as on-demand content.