Data processing: database and file management or data structures – File or database maintenance – Database archive
Reexamination Certificate
2004-01-07
2010-06-08
Mahmoudi, Tony (Department: 2169)
Data processing: database and file management or data structures
File or database maintenance
Database archive
C707S609000, C707S698000, C707S687000
Reexamination Certificate
active
07734595
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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Fish & Richardson P.C.
Kim Paul
Mahmoudi Tony
Permabit Technology Corporation
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