It&#x27;s quite easy to come up with good rules that resolve orders without serialization, and certainly without FIFO serialization. There are a number of strategies that could be employed, including &quot;fractional allocation&quot; and &quot;pick randomly&quot;. I doubt it really matters exactly what you pick as long as 1) the rules are applied evenly and 2) everyone thinks they are fair.<p>&quot;My ethernet cable is 5m shorter than your ethernet cable&quot; is does not sound like a reasonable input to the fairness function.