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US 6,154,811 AGranted
Scalable network object caching
AssigneeAT&T Corp.
InventorsSinisa Srbljic, Partha P. Dutta, Thomas B. London, Dalibor F. Vrsalovic, John J. Chiang
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AssigneeAT&T Corp.
InventorsSinisa Srbljic, Partha P. Dutta, Thomas B. London, Dalibor F. Vrsalovic, John J. Chiang
Estimating the term…
A scalable distributed caching system on a network receives a request for a data object from a user. The caching system carries out a locator function that locates a directory cache for the object. The directory cache stores a directory list that identifies the locations of object caches that purport to store copies of the object requested by the user. The object caches on the object directory list are polled, and in response send messages to the cache that received the user request indicating if each object cache stores a copy of the requested object. The receiving cache sends a message requesting a copy of the object to the object cache that sent the message first received by the receiving cache indicating that an object cache stores the requested object. The object cache that sent the first received message then sends a copy of the object to the receiving cache, which stores a copy and then sends a copy to the user. The directory list for the object is then updated by adding the network address of the receiving cache. Outdated copies of objects stored on object caches are deleted in a distributed fashion to maintain the coherence of the cached copies. This is further reinforced by the association of time-to-live parameters with the each copy and each object cache address on directory lists.
A scalable distributed caching system for users on a network with data objects having network addresses, comprising a receiving cache that receives a request for an object from a user, said receiving cache comprising a data bus connecting a receiving cache processor, a receiving cache computer readable memory and a receiving cache port adapted to be coupled to a network, wherein said receiving cache carries out a directory locator function that uses the user request for a data object as an input and provides a pointer to a directory cache as an output, said directory cache comprising a directory cache data bus connecting a directory cache processor, a directory cache computer readable memory and a directory cache port adapted to be coupled to a network, wherein said directory cache stores a directory list for the requested object in said directory cache computer readable memory, said directory list comprising the network address of the requested object and a network address of an object cache on the network, said object cache comprising an object cache data bus connecting an object cache processor, an object cache computer readable memory and an object cache port adapted to be coupled to a network, and wherein said object cache is adapted to store a copy of the requested object in said object cache computer readable memory of said object cache.
A method for implementing a scalable distributed caching system on a network that receives a request from a user for a data object stored on the network, comprising the steps of:
A scalable distributed caching system on a network, comprising:
Dependencies are inferred from the claim text.