State machine replication, and why you should care
There's a whole database, Datomic, that works roughly this way -- not the UDP multicast but the idea of having a slightly more nuanced consistency/availability/partition tolerance tradeoff by having a thin transaction organizer which is not partition tolerant and officially states which one came first and second, upstream of the replicas that grant normal availability.I would have liked the discussion about Raft/Paxos that they said they'd leave out of this episode though :(