North American Network Operators Group
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Re: Scalable Mail solution with NAS
- From: Eric Sobocinski
- Date: Wed Jan 31 13:44:09 2001
At 11:06 AM -0500, 01/31/2001, Sebastien Berube wrote:
One way to fix this
issue would be to use a hashing scheme to split the amount of actual
mailboxes into a subdirectory structure. You could get something like
johndoe@yourdomain.com would have his mailbox in
/export/mailboxes/j/o/h/n/johndoe.mbox
so in /export/mailboxes, in order to find the j directory, you only have
about 36 directories entries or so.
Although this example is not good in the case where you accept usernames
with 3 or less characters.
It's not hard to right-pad any short usernames before hashing. For
instance, the username "bo" might hash as "bo__" and thus would end up in
the directory "/export/mailboxes/b/o/_/_/bo.mbox". If you allow
non-alphanumerics you'll want to translate those to something innocuous as
well, or a name such as "bo.lee" will cause problems.
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