In the VOS document, the MVCC section mentions "The MVCC rules ensure that transactions execute as if they are serialized in their epoch order while complying with external consistency, as long as the system clock offsets are always within the expected maximum system clock offset (epsilon )."

    I want to know whether the external consistency here has the same meaning as google spanner's external consistency? which is "In addition if one transaction completes before another transaction starts to commit, the system guarantees that clients can never see a state that includes the effect of the second transaction but not the first."