Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 8, 2008
0Patent Application Number
107528720
Date Filed
January 7, 2004
0Patent Primary Examiner
Patent abstract
A method by which a disk-based distributed data storage system is organized for protecting historical records of stored data entities. The method comprises recording distinct states of an entity, corresponding to different moments of time, as separate entity versions coexisting within the distributed data storage system, and assigning expiration times to the entity versions independently within each of a plurality of storage sites according to a shared set of rules, before which times deletion is prohibited.
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