Abstract
Passive replication is a popular practical approach to fault tolerance [1]. Using the Paxos consensus protocol [4] to implement it is seeing a growing popularity lately, but requires taking care of peculiar constraints. State updates must be applied using the same sequence of generation: if a primary is in state A and executes an operation making it transition to state B, the resulting state update δ AB must be applied to the state A. Applying it to a different state C ≠ A is not safe because it might lead to an incorrect state, which is inconsistent with the history observed by replicas and clients. Paxos does not necessarily preserve the dependency between A and the delivery of δ AB , as observed in [3].
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Junqueira, F., Serafini, M. (2012). Brief Announcement: Consensus and Efficient Passive Replication. In: Aguilera, M.K. (eds) Distributed Computing. DISC 2012. Lecture Notes in Computer Science, vol 7611. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33651-5_40
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DOI: https://doi.org/10.1007/978-3-642-33651-5_40
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