1. A method comprising: monitoring, at a content delivery network service provider, requests originally initiated from a first cluster of client computing devices, wherein the content delivery network service provider hosts content on behalf of a content provider and wherein the requests from the first cluster of client computing devices correspond to requests for a portion of the content hosted on behalf of the content provider; associating content corresponding to the monitored requests with the first cluster of client computing devices to determine a first group of content collectively corresponding to the first cluster; identifying a second set of content for a second cluster of client computing devices based at least in part on the first group of content, wherein the second set of content is identified from another portion of the content hosted on behalf of the content provider and wherein the identified second set of content is different from the first group of content; and preloading at least a portion of the identified second set of content at a cache component authorized to service the second cluster of client computing devices, wherein the method is performed by one or more computing devices of the content delivery network service provider.