Consensus Protocols: Three-phase Commit | Paper TrailLast time we looked extensively at two-phase commit, a consensus algorithm that has the benefit of low latency but which is offset by fragility in the face of participant machine crashes. In this short note, I’m going to explain how the addition of an extra phase to the protocol can shore things up a bit, at the cost of a greater latency. The fundamental difficulty with 2PC is that, once the decis
