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Communication-induced determination of consistent snapshots

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3 Author(s)
Helary, J.-M. ; IRISA, Rennes, France ; Mostefaoui, A. ; Raynal, M.

A classical way to determine consistent snapshots consists in using Chandy-Lamport's algorithm. This algorithm relies on specific control messages that allow processes to synchronize local checkpoint determination and message recording in order for the resulting snapshot to be consistent. This paper investigates a communication-induced approach to determine consistent snapshots. In such an approach, control information is carried out by application messages. Two abstract necessary and sufficient conditions are stated: one associated with global checkpoint consistency, the other associated with message recording. A general protocol is derived from these abstract conditions. Actually, this general protocol can be instantiated in distinct ways, giving rise to a family of communication-induced snapshot protocols. This general protocol shows there is an intrinsic trade-off between the number of forced checkpoints and the number of recorded messages. Finally, a particular instantiation of the general protocol is provided

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Parallel and Distributed Systems, IEEE Transactions on  (Volume:10 ,  Issue: 9 )