Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2008-01-01
2008-01-01
Thai, Tuan V. (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S151000, C711S152000, C711S154000
Reexamination Certificate
active
07315926
ABSTRACT:
A protocol is provided for allocating file locking tasks between primary and secondary data mover computers in a network file server. When there is frequent read access and infrequent write access to a file, a primary data mover grants read locks to the entire file to secondary data movers, and the secondary data movers grant read locks to clients requesting read access. When write access to the file is needed, the read locks to the entire file are released and the read locks granted to the clients are released or expire or are demoted to non-conflicting byte range locks managed by the primary data mover. Concurrent read and write access to the same file is then managed by the primary data mover.
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Faibish Sorin
Fridella Stephen A.
Gupta Uday K.
Jiang Xiaoye
Auchterlonie Richard C.
EMC Corporation
Novak Druce & Quigg LLP
Thai Tuan V.
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