Method and apparatus for accelerating the expiration of...

H - Electricity – 04 – L

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H04L 29/02 (2006.01) G06F 12/02 (2006.01) G06F 17/30 (2006.01) H04L 29/04 (2006.01)

Patent

CA 2530720

One embodiment of the present invention provides a system that facilitates reconfirmation of resource records in a cache. The system starts by retrieving the resource record at a client and attempting to establish communication using the data in that resource record. In the event that communication is not successful, the system responds by issuing one or more queries for the resource record in question. The system then waits for a response to the query. If the response to the query is not received in a pre-determined amount of time, the system invalidates the resource record. The response from the device is a multicast response, thereby allowing other clients to update corresponding resource records in their local caches without querying the device, and thus saving network bandwidth.

Dans une forme de réalisation, la présente invention concerne un système qui facilite la reconfirmation des enregistrements de ressources dans une antémémoire. Le système commence par extraire l'enregistrement de ressource d'un client, et tente d'établir la communication en utilisant les données de l'enregistrement de ressource. Lorsque la communication ne peut être établie, le système réagit en émettant une ou plusieurs interrogations se rapportant à l'enregistrement de ressource concerné, puis il attend un réponse à l'interrogation. Si aucune réponse à l'interrogation n'est obtenue après un délai prédéterminé, le système invalide l'enregistrement de ressource. La réponse en provenance de l'unité est une réponse multidiffusée, et permet ainsi à d'autres clients de mettre à jour les enregistrements de ressources correspondants dans leurs antémémoires locales, sans interroger l'unité, ce qui permet de réaliser des économies de largeur de bande réseau.

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