I was also surprised by the discussion of stronger isolation in the paper. The paper claims snapshot isolation hasn’t been implemented in distributed systems yet, because it strictly requires a centralized global counter to serialize transactions. This is flagged as a fatal bottleneck and single point of failure.
The ability to renegotiate a connection has been removed from the next version of this
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На Украине заявили о «топливной лихорадке»08:39