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Method and apparatus for accelerating the expiration of resource records in a local cache

  • US 9,619,517 B2
  • Filed: 05/15/2014
  • Issued: 04/11/2017
  • Est. Priority Date: 08/20/2003
  • Status: Expired due to Term
First Claim
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1. A computer-implemented method, comprising:

  • receiving at a client, a first multicast message of a query from another client, wherein the query identifies a device;

    locating a resource record associated with the device in a local cache at the client;

    waiting at the client for a multicast message of a response from the device, wherein the response from the device is associated with the query;

    receiving at the client, a predetermined number of multicast messages of the query from the another client without receiving a corresponding multicast message of the response from the device;

    in response to the receiving, invalidating the resource record associated with the device;

    identifying other resource records in the local cache that refer to the invalidated resource record, comprising;

    retrieving a parent record of the invalidated resource record at the client, wherein the parent record refers to the invalidated resource record; and

    issuing a second multicast message of a parent-record query based at least on the parent record.

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