Reply to post: Statistics

AWS outgrows its own resource numbering scheme



Because of the birthday paradox, if the identifiers are assigned at random (and they better be or the whole system is insecure) that after assigning about square root number of all available means you have a 50% chance every time you assign a new one to pick already selected one.

In other words, they prepare for a more modest number of about 1.69266 * 10^13 (16 trillion short scale, 16 billion long scale) tracked items.

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