Techniques for handling lock-related inconsistencies

Details Techniques for handling lock-related inconsistencies Techniques for handling lock-related inconsistencies

2008-01-01

2008-01-01

Rinehart, Mark H. (Department: 2112)

Electrical computers and digital data processing systems: input/

Access locking

C707S793000, C714S002000, C714S025000, C714S047300, C718S105000

Reexamination Certificate

active

07315910

ABSTRACT:
Techniques are described herein for handling lock-related inconsistencies. As mentioned above, such inconsistencies occur when two or more sets of lock information, relating to the same resource, convey inconsistent information about locks requested and/or granted on that resource. In general, the techniques involve causing the locally-stored lock information about a resource to be sent to the master node of the resource. The master node of the resource compares the lock information thus received against the lock information maintained by the master node. Based on the comparison, the master node determines how to resolve the lock-related inconsistency, and sends messages to those nodes that need to change their local lock information for the resource. Once all of the lock information has been made consistent, the resource made available for access.

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Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration received in corresponding International application No. PCT/US2006/022501.
Hastings, A., “Distributed Lock Management in a Transaction Processing Environment”, IEEE Comp. (1990) pp. 22-30.

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