Methods and apparatus for backing up and restoring data portions stored in client computer systems

摘要: Mechanisms and techniques operate in a computerized device to perform backup restore operations on data portions such that if server already has copy of the content portion, no client computer systems need transfer portion server, even those clients different name, location, or other attributes. A produces an identification stored within first be backed up. The conveys, receives, over communications interface, indication from server. determines indicates contains identified by identification, not, transfers local storage interface.