Patents Assigned to Permabit, Inc., a Massachusets corporation
  • History preservation in a computer storage system
    Publication number: 20040167913
    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.
    Type: Application
    Filed: January 7, 2004
    Publication date: August 26, 2004
    Applicant: Permabit, Inc., a Massachusets corporation
    Inventor: Norman H. Margolus