Patent ID: 6950820
Filing Date: 2005-09-27
Classification: G06F,Y10S

Abstract:
1. A method for controlling access to data, residing on one node, from a plurality of nodes which are coupled together as a distributed peer-to-peer data processing system group, said method comprising the steps of: assigning to said data a global incarnation number which is accessible to processes running on said nodes; assigning to local versions of said data within individual nodes a local incarnation number; providing to nodes within said group a change notification regarding said data; comparing, within at least one of said nodes in said group upon receipt of said change notification, said global incarnation number with the local incarnation number; based upon said comparison, providing, to at least one node in said group, a proposed incarnation number; and determining, for at least one node in said group, whether to update the local version of said data within said node based upon a comparison of said global incarnation number with said proposed incarnation number.