US Patent 10075551 Request management for hierarchical cache

A computer implemented cache management system and method is provided for use with a service provider configured to communicate with one or more client devices and with a content provider. The system includes a cache hierarchy comprising multiple cache levels that maintain at least some resources for the content provider, and one or more request managers for processing client requests for resources and retrieving the resources from the cache hierarchy. In response to a resource request, the request manager selects a cache level from the cache hierarchy based on a popularity associated with the requested resource, and attempts to retrieve the resource from the selected cache level while bypassing cache level(s) inferior to the selected level.