Optimistic recovery in a distributed processing system

Details Optimistic recovery in a distributed processing system Optimistic recovery in a distributed processing system

G - Physics

06

F

354/221

G06F 11/00 (2006.01) G06F 11/14 (2006.01) G06F 15/16 (2006.01)

Patent

CA 1223369

OPTIMISTIC RECOVERY IN A DISTRIBUTED PROCESSING SYSTEM ABSTRACT OF THE DISCLOSURE In a distributed system whose state space is partitioned into recovery units, wherein recovery units communicate by the exchange of messages and wherein a message re- ceived by a recovery unit may causally depend on other recovery units having received prior messages, a method of recovering from failure of any number of recovery units in the system comprising the steps of: (a) tracking the dependency of each message received by a recovery unit in terms of the causative messages re- ceived by other recovery units in the system; and (b) restoring all recovery units to a consistent system-wide state after recovery unit failure by means of the tracked message dependencies.

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