A primary computer system maintains a master audit trail of changes made to the primary database. A fuzzy database copy of a portion of the primary database is generated by copying the primary database portion using a shared load operation so as to copy the primary database portion without regard to...http://www.google.com/patents/US5884328?utm_source=gb-gplus-sharePatent US5884328 - System and method for sychronizing a large database and its replica
