On Fri, May 23, 2003 at 10:59:39AM +0200, Volker Tanger wrote: > > Quite a number of filesystems still do linear search when trying to > access a file. So accessing the mailbox for Zacharias Zulu (zzulu) among > 20.000 users will give the OS probably 19.998 filenames too look up
--------------------------------snip------------------------------------- Thanks all for your explanations! I summarize here the benefits of hash directories I've heard (simple and practical explanation;-)). - better performances because classical FS (such as ext3 in my case) are slower with a big number of entries in a directory. - easier to scale, because you can easily put some ranges of accounts in another partition/disk/server by moving some directories. - easier to administer, because we don't like waiting when doing "ls";-) So for my purpose, I will run with a two level hash ([0-9a-z]/[0-9a-z]) for users maildirs, and create them in the ldap based on the uid with something like this (perl) : $mailbox = $uid; $mailbox =~ s/[^a-z^0-9]+//g; $mailbox =~ s/(.)(.).*/\/home\/vmail\/$1\/$2\/$uid\//; (this could help someone :-)) -- Emmanuel Lacour ------------------------------------ Easter-eggs 44-46 rue de l'Ouest - 75014 Paris - France - Métro Gaité Phone: +33 (0) 1 43 35 00 37 - Fax: +33 (0) 1 41 35 00 76 mailto:[EMAIL PROTECTED] - http://www.easter-eggs.com
