Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2005-10-25
2005-10-25
Channavajjala, Srirama (Department: 2166)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C707S793000, C709S203000
Reexamination Certificate
active
06959310
ABSTRACT:
A system, method and computer readable medium for providing a standby file system with snapshot feature is disclosed. A first snapshot of a primary file system is generated. Next, a standby file system restores the first snapshot of the primary file system in the standby file system and a snapshot of the standby file system is taken. Then, a second snapshot of the primary file system is taken and a data set capturing the differences between the first snapshot of the primary file system and a previous data set of the primary file system is generated. Subsequently, the data set is applied to the standby file system. Upon unavailability of the primary file system, the standby file system is initialized as the new primary file system. Upon recovery of the old primary file system, the old primary file system is initialized as a new standby file system.
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Eshel Marc M.
Haskin Roger L.
Sawdon Wayne A.
Schmuck Frank B.
Channavajjala Srirama
Cutter Lawrence D.
Fleit Kain Gibbons Gutman Bongini & Bianco P.L.
Giunta Jeffrey N.
International Business Machines - Corporation
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