Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2007-12-25
2007-12-25
Gaffin, Jeffrey (Department: 2165)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C707S793000, C707S793000, C711S113000, C711S114000, C711S148000, C711S161000, C711S162000, C714S020000
Reexamination Certificate
active
10752256
ABSTRACT:
A data storage facility for transferring data from a data altering apparatus, such as a production data processing site to a remote data receiving site. The data storage facility includes a first data store for recording each change in the data generated by the data altering apparatus. A register set records each change on a track-by-track basis. A second data store has first and second operating modes. During a first operating mode the second data store becomes a mirror of the first data store. During a second operating mode the second data store ceases to act as a mirror and becomes a source for a transfer of data to the data receiving site. Only information that has been altered, i.e., specific tracks that have been altered, are transferred during successive operations in the second operating mode. Commands from the local production site initiate the transfers between the first and second operating modes.
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Gagne Mathieu
Ofek Yuval
EMC Corporation
Gaffin Jeffrey
Herbster George A.
Radtke Mark Andrew X
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