[Dovecot] converting from mbox to maildir ?

[Frank Bonnet]

Le 02/02/2012 10:20 AM, Timo Sirainen a écrit :
> On Thu, 2012-02-02 at 09:53 +0100, Frank Bonnet wrote:
>> Le 02/01/2012 09:39 PM, Timo Sirainen a écrit :
>>> On 30.1.2012, at 10.37, Frank Bonnet wrote:
>>>
>>>> We are planning to convert our mailhub ( freebsd 7.4 ) from mbox
>>>> format to maildir format.
>>> I'd do it one user at a time with dsync, but unfortunately:
>>>
>>>> the machine use real users thru openldap ( pam_ldap + nss_ldap )
>>> nss_ldap can't store the mail_location override field needed to distinguish mbox user from maildir user. Maybe you could temporarily switch to some other userdb, which would allow extra fields. Also this requires that you deliver mails using dovecot-lda/lmtp.
>>>
>>>> another problem is disk space. The users's email data takes about
>>>> 2 Terabytes of data and I cannot duplicate as I only have 3 Tb on
>>>> the raid array of the server.
>>> With one-user-at-a-time conversion this wouldn't be an issue.
>>>
>> so is there a massive conversion method ?
> dsync works for that too:
>
> 1. dsync backup all users somewhere
> 2. wait close to the time you can shut down dovecot
> 3. dsync backup all users the second time
> 4. shutdown dovecot and MTA
> 5. dsync backup once more (hopefully this will be relatively quick)
>
> The idea is that you can do incremental dsync backups. You'll of course
> need to do this in a way that you don't run out of disk space..
>

Well I have NFS access to a Netapp filer with a LOT of disk space
I need some modifications in my dovecot configuration to use NFS
I think ?

see below the output of doveconf -n

thanks

mail# doveconf -n
# 2.0.16: /usr/local/etc/dovecot/dovecot.conf
# OS: FreeBSD 7.4-RELEASE amd64
auth_verbose_passwords = plain
auth_worker_max_count = 100
debug_log_path = /var/log/dovecot/debug.log
default_client_limit = 6144
default_process_limit = 1024
default_vsz_limit = 1 G
disable_plaintext_auth = no
info_log_path = /var/log/dovecot/info.log
log_path = /var/log/dovecot/dovecot.log
mail_location = 
mbox:%h/:INDEX=/raid/cache/dovecot/index/%u:INBOX=/raid/var/mail/%u:CONTROL=%h/
mail_temp_dir = /var/tmp
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope 
encoded-character vacation subaddress comparator-i;ascii-numeric 
relational regex imap4flags copy include variables body enotify 
environment mailbox date ihave
mbox_lock_timeout = 3 mins
mbox_write_locks = fcntl
mmap_disable = yes
passdb {
   args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
   driver = ldap
}
plugin {
   acl = vfile
   sieve = ~/.dovecot.sieve
   sieve_dir = ~/sieve
}
postmaster_address = postmaster at esiee.fr
protocols = imap pop3
sendmail_path = /usr/local/sbin/sendmail
service auth {
   client_limit = 7169
}
service imap-login {
   inet_listener imap {
     port = 143
   }
   inet_listener imaps {
     port = 993
     ssl = yes
   }
   process_min_avail = 10
   service_count = 1
   vsz_limit = 3 G
}
service imap {
   process_limit = 2048
   vsz_limit = 3 G
}
service managesieve-login {
   inet_listener sieve {
     port = 4190
   }
   inet_listener sieve_deprecated {
     port = 2000
   }
}
service pop3-login {
   inet_listener pop3 {
     port = 110
   }
   inet_listener pop3s {
     port = 995
     ssl = yes
   }
}
ssl_ca = /etc/ssl/xxx.pem
ssl_cert = </etc/ssl/xxx.pem
ssl_key = </etc/ssl/xxx.key
userdb {
   args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
   driver = ldap
}
verbose_proctitle = yes
protocol lda {
   info_log_path = /var/log/dovecot/dovecot-lda.log
   log_path = /var/log/dovecot/dovecot-lda-errors.log
   mail_plugins = sieve $mail_plugins
}
protocol imap {
   imap_client_workarounds = tb-extra-mailbox-sep
   mail_max_userip_connections = 30
}
protocol sieve {
   mail_max_userip_connections = 30
   managesieve_implementation_string = Dovecot Pigeonhole
}