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Alternately, you could use the IP address of the user (assuming it is available). There's several ways in which you could use the IP address for this, the easiest of which may be to take the modulo of any combination/all/one of the octets.

You could even then ensure you get some sort of consistency in approach for users on the same network by determining the network class, and then taking the modulo of the network portion of the IP address only. Hence users on the same network (even those with DHCP addreses) would always go to the same destination.

You'll never get a perfect 50/50 spread with this approach, but you'll get a fair spread.


In reply to Re^4: Send x% of the users to A, the rest to B by ltp
in thread Send x% of the users to A, the rest to B by DreamT

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