Re: [courier-users] Weired quota recalculation

Sun, 14 Aug 2016 06:53:14 -0700 

chaouche yacine writes:


Bonjour courier users,

I have a weired problem with setting quotas on mailboxes. Here's an example :

For this mailbox, current consumed quota is 690880961 on a 840957952 limit
root@messagerie[CHROOT][10.10.10.20] ~/SCRIPTS/MAIL # head /var/vmail/algerian-radio.dz/a.chaouche/maildirsize 
840957952S
690880961 7252
root@messagerie[CHROOT][10.10.10.20] ~/SCRIPTS/MAIL #

What's really on the disk is 698912048,
root@messagerie[CHROOT][10.10.10.20] /var/vmail/algerian-radio.dz/a.chaouche # du -s -b 
698912048     .
root@messagerie[CHROOT][10.10.10.20] /var/vmail/algerian-radio.dz/a.chaouche #
I made the math it's 7 megs difference, but that's "ok" compared to when I change the quota limit from initial 840 957 952 to 700 000 000 (still above what's on disk and what's reported on maildirsize). Quota goes from 690880961 to 844259131 ?
root@messagerie[CHROOT][10.10.10.20] ~/SCRIPTS/MAIL # maildirmake.courier -q 700000000S /var/vmail/algerian-radio.dz/a.chaouche/ root@messagerie[CHROOT][10.10.10.20] ~/SCRIPTS/MAIL # head /var/vmail/algerian-radio.dz/a.chaouche/maildirsize 
700000000S
  844259131      24530

root@messagerie[CHROOT][10.10.10.20] ~/SCRIPTS/MAIL #


Am I doing something wrong ?


No.
Courier calculates the size of the mailbox, in exact bytes. du/df report the usage in disk blocks. As you were taught in the "Operating System 101" course, in college, a single byte file will, with most filesystems, take up a single block of disk space, which on Linux is 4096 bytes. 

See also: http://www.courier-mta.org/maildirquota.html

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