Method, apparatus and system for remote file sharing

Details Method, apparatus and system for remote file sharing Method, apparatus and system for remote file sharing

2005-05-10

2005-05-10

Rones, Charles (Department: 2164)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C709S223000, C709S212000, C370S380000

Reexamination Certificate

active

06892203

ABSTRACT:
A technique is described to enable exclusive control on a file basis in a storage system while remote double recording is performed between storage controllers. A first shared-file controller has a table that stores control information used for excluding read and write to that file on a file basis. When the shared-file controller receives a data write request, it sets access to the file as exclusive, and then issues a command to a second shared file controller to set control information for that file. After data is written into a storage medium and mirrored to a second storage medium, a copy of the file management information is stored in memories of the shared-file controllers. The consistency of the file management information is maintained between the two file controllers by copying the file management information over the network.

REFERENCES:
patent: 5155845 (1992-10-01), Beal et al.
patent: 20030074417 (2003-04-01), Kasako et al.
patent: 20030105852 (2003-06-01), Das et al.
patent: 20040148376 (2004-07-01), Rangan et al.
patent: 10-269030 (1998-10-01), None

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