Optimistic reads in a multi-node environment

Details Optimistic reads in a multi-node environment Optimistic reads in a multi-node environment

2007-12-11

2007-12-11

Ellis, Kevin L. (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Shared memory area

Reexamination Certificate

active

11641632

ABSTRACT:
A method, system, computer system, and computer program produce to support a distributed environment in which changes to data shared by multiple nodes are logged using private logs and managed by a coordinator. The coordinator recognizes invalidating operations and informs a reader when data need to be read again after an invalidating operation corrupted and/or caused the copy of the data read by the reader to be out-of-date. The coordinator can provide a location from which current valid data can be read. The coordinator can use an operations history to detect invalidating operations and operations trackers to determine when a node is not synchronized with the coordinator.

REFERENCES:
patent: 6557069 (2003-04-01), Drehmel et al.
patent: 6829665 (2004-12-01), Jones et al.
patent: 6832297 (2004-12-01), Pfister et al.

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