Patent ID: 6367029
Filing Date: 2002-04-02
Classification: G06F

Abstract:
A file server system for storing data objects with respective object identifiers and for servicing requests from remote client systems specifying the object identifier of the requested object, the file server system comprising:a file store configured to hold stored objects with associated object identifiers, wherein said file store includes at least a primary copy and a back-up copy; a signature generator for computing an object-specific signature from an object; and a signature checker comprising a signature store for holding a previously computer signature for each of the stored objects and a comparator operable to compare, on the basis of a specified object identifier, a signature retrieved from the signature store with a corresponding signature computed by the signature generator from an object retrieved from the file store, wherein the primary copy of the file store, the back-up copy of the file store, and the signature checker are located at different nodes of the system.