Patent ID: 6578113
Filing Date: 2003-06-10
Classification: G06F

Abstract:
A method for maintaining consistency in a cache of a first server in a data communication network, the method comprising the steps of:receiving a client request for a data resource at the first server; determining whether the cache holds the requested data resource; detecting a freshness of the requested data resource if determined to be held by the cache; when said freshness of said requested data resource falls outside a predetermined range, generating a first change-status request relating to said requested data resource to a source of that requested data resource; in response to generating said first change-status request, identifying at least one other data resource held by the cache and from said source and generating a second change-status request relating to said at least one other data resource to said source; and sending said first change-status request and said second change-status request in a piggybacked communication to said source.