Dag-Erling Smorgrav <[EMAIL PROTECTED]> wrote:
>
>If you only have half a million users, pick a prime number K close to
>the square root of the expected number of users (724 in your case -
>closest primes are 719 and 727), create that many bucket directories,
>and place each user in bucket ID mod K.
Why a prime number? All you need is an even spread, and given that
user IDs are usually allocated sequentially any modulus will do.
Tony.
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