An apparatus, program product and method to synchronize group state data in a primary-backup group in connection with the rejoining of a member to the primary-backup group in a clustered computer system. Each member in the group includes a copy of replicated group state data for the primary-backup group....http://www.google.se/patents/US7231461?utm_source=gb-gplus-sharePatent US7231461 - Synchronization of group state data when rejoining a member to a primary-backup group in a clustered computer system
