Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2007-09-04
2007-09-04
Sparks, Donald (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
Reexamination Certificate
active
10766022
ABSTRACT:
A storage system conducting remote copy functions such that, when data is updated at a local site, contents of the update can be referred to in real time by storage at a remote site. A disk-control unit at a remote site receives file data written in accordance with an update of a file in a storage system at a local site and a history of the file-management information from the storage system at the local site and stores the data and the history. A file-system processing unit refers to the history and updates the file-management information in a file-system cache in accordance with the update of the file in the storage system at the local site. When a client issues a read request, the file-system processing unit refers to the file-management information updated in the file-system cache and transfers the contents of the update of the file to the client.
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Minwen Ji, Alistar Vietch, John Wilkes, “Seneca: Remote Mirroring Done Write”, Proceedings of USENIX Technical Conference, pp. 253-268, Jun. 2003, USENIX, Berkely, CA.
Kitamura Manabu
Nakatani Yoji
Diller Jesse
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Sparks Donald
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