Previously in Jepsen, we discussed MongoDB. Today, weâll see how last-write-wins in Riak can lead to unbounded data loss. So far weâve examined systems which aimed for the CP side of the CAP theorem, both with and without failover. We learned that primary-secondary failover is difficult to implement safely (though it can be done; see, for example, ZAB or Raft). Now Iâd like to talk about a very di
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