On Dec 23 2004, Devdas Bhagat wrote:
On 23/12/04 16:04 +1000, Laird Breyer wrote:
<snip>
Either way, let's take Devdas Bhagat's statistics
http://nixcartel.org/~devdas/minute.png
I don't know if these numbers include invalid users or not, but let's
say 60K invalid requests per minute, and another 10K valid requests.
The breakup is very roughly 25% invalid users, 25% DNSBLs and 50% local
IP blocks.
And the invalid user query is a database hit (40 million+ users and
those keep changing very rapidly).
Right, 15K invalid database hits per minute. What I'm proposing needs a fairly
static list, as that's what is needed to build a quick lookup table (here
quick means you can find out your answer in n character comparisons and jumps
, where n is the number of characters in the email address, independent of the
total number of users. This would also work for IP addresses).
While your 40 million user database has constant activity, I presume the
vast majority of usernames have a long lifetime, a few days at least.
So if you build username snapshots at fixed intervals, then users would have
to wait a little for their new address to become "live" etc.
--
Laird Breyer.
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