Gustavo Vieira Goncalves Coelho Rios <[EMAIL PROTECTED]> writes:
> The functions that will hash the id, accepts an id as input and returns
> a string for the user dir, like:
>
> Id String returned
> 0 0/0/0/0/0/0/0/0
> [..]
That gives you 2^32 leaf directories plus approximately 2^28
intermediate directories, which is a helluva lot of inodes (4581298448
to be exact), and your files will be spread all over your disk(s),
throwing performance down the drain.
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.
DES
--
Dag-Erling Smorgrav - [EMAIL PROTECTED]
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