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Necessary and sufficient conditions for consistent global snapshots

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2 Author(s)
R. H. B. Netzer ; Dept. of Comput. Sci., Brown Univ., Providence, RI, USA ; Jian Xu

Consistent global snapshots are important in many distributed applications. We prove the exact conditions for an arbitrary checkpoint, or a set of checkpoints, to belong to a consistent global snapshot, a previously open problem. To describe the conditions, we introduce a generalization of Lamport's (1978) happened-before relation called a zigzag path

Published in:

IEEE Transactions on Parallel and Distributed Systems  (Volume:6 ,  Issue: 2 )