Masterless locks in a multi-node environment

Details Masterless locks in a multi-node environment Masterless locks in a multi-node environment

2008-03-04

2008-03-04

Thomson, William (Department: 2194)

Electrical computers and digital processing systems: virtual mac

Task management or control

Process scheduling

C709S217000, C709S223000, C709S225000, C709S226000, C711S150000, C711S152000, C726S002000, C726S003000, C707S793000, C710S028000, C710S036000, C710S200000

Reexamination Certificate

active

10423146

ABSTRACT:
A method, system, application programming interface, computer system, and computer program product to provide locks for controlling access to data by nodes in a multi-node environment while minimizing messages sent between nodes. Based upon knowledge of lock usage in the multi-node environment, a multi-node knowledge agent can determine when no other node is accessing data protected by a given lock, as well as when an event has occurred that precedes a request by another node to access data protected by the given lock. When no other node is accessing data and no such event has occurred, the multi-node knowledge agent can designate that given lock as “masterless.” A lock agent on the node hosting the multi-node knowledge agent is authorized to subsequently grant access to the data protected by the masterless lock to clients on that node without communicating with a lock master, which may reside at another node.

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