Comment by stackghost
Comment by stackghost 5 hours ago
>a simple matter of keeping track of all the delivered messages and removing duplicates
Ron, if you have received duplicate messages then by definition you have been delivered that message more than once.
I don't have a PhD in computer science so maybe you can explain how this constitutes "exactly once".
> if you have received duplicate messages then by definition you have been delivered that message more than once
Yes. So? If you don't include a mechanism for ensuring exactly-once delivery then you will not be guaranteed exactly-once delivery. But if you do, you will. It doesn't actually require a Ph.D.