Jost Krieger <[EMAIL PROTECTED]> wrote:
>I think we are spreading urban legends here.
>
>AFAIK, the primality is for double hashing in conflict resolution.
>Nothing of that kind is going on here.
You're right. The "hashing" used here is a simple modulo. From
fmtqfn.c:
i = fmt_ulong(s,id % auto_split); len += i; if (s) s += i;
I can't see that primality would do anything special here.
However, the default, 23, is prime, and in his only message to the
list on the topic of conf-split, DJB suggested a value of 401, also
prime, for a queue with 100000 entries:
http://www.ornl.gov/its/archives/mailing-lists/qmail/1997/07/msg00295.html
Why would DJB use primes if they weren't necessary? He uses round
numbers elsewhere (concurrencies, for example), so I don't think he
just likes them.
So...anyone who still thinks conf-split must/should be prime... Could
you explain why?
-Dave
