[Dovecot] cyrus2dovecot script converts mailboxes to bigger sizes

[Igor Zinovik]

Completly PEBKAC problem.  I was not cleaning Maildir directory after
several conversions.

2012/9/12 Igor Zinovik <zinovik.igor at gmail.com>:
>  Hello, list.
>
> I'm asking question not directly connected with dovecot.
>
> I'm planning a migration from cyrus-imapd to dovecot and i'm using
> cyrus2dovecot script (by Freie Universität Berlin) to convert mailboxes
> of users, but i'm wondering why size of mailbox in Maildir++ is so
> much bigger than mailbox in cyrus format after conversion:
> linux-a9qw:~/ # du -sh /mnt/imap/z/user/zinovik
> /srv/vmail/petrsu.ru/z/zinovik/Maildir
> 238M    /mnt/imap/z/user/zinovik
> 1.2G    /srv/vmail/mydom.ru/z/zinovik/Maildir
>
> I was planning to implement quota for mailboxes about 1 gigabyte,
> but after conversion I would not be able to receive messages to my own
> box, because i'm overquota.
>
> I think the only way would be to set quota up to 15 GB since some of users
> have mailbox with 12GB after conversion, but I have no such disk capacity
> to allow more than 1500 users have 15GB quota.
>
> Would it be practical solution to compress all files after conversion and enable
> zlib support in dovecot?