paxos:failed/1

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Predicate failed/1

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node(?NodeId)[private]

quorum(?Bitmap)[private]

dead(?Bitmap)[private]

failed(?Bitmap)[private]

failed(?NodeId, ?LastTried, ?Score)[private]

Track our identity as well as as the status of our peers in the network. NodeId is a small integer. Multiple NodeIds are combined in a Bitmap.

node/1 is our identity.
quorum/1 is the set of members of the quorum
failed/1 is the set of members for which the last message was not confirmed.
failed/3 tracks individual failed nodes. If accumulates failures until the node is marked dead.
dead/1 is the set of members that is considered dead.

node(-Node) is det[private]

Get the node ID for this paxos node.