[aordano]

- There also is Paxos[0] as the most significant option.

- You should not have too many nodes to make a decision, this is usually reserved for leaders; if you have a large distributed system you may clusterize them or forward decisions to leaders, whom decide for consensus. If you clusterize, the leaders for each node can also be selected by consensus. If you can't do any of those then having a consensus protocol might not even be a good idea; you'd end up with a sort of merkle tree (or some sort of blockchain) to make sure all the data is registered, or maybe audit transactions. In any case this[1] might be interesting.

[0] https://en.wikipedia.org/wiki/Paxos_(computer_science) [1] https://doi.org/10.1016/j.neucom.2016.10.011