On 2/26/13 12:56 AM, Michael Grimm wrote:

On 2013-02-25 22:57, list@airstreamcomm.net wrote:

...

Trying the dsync replication for the first time, and I am confused as to the intended purpose of the replication service. Is the dsync replication meant to replicate mails immediately upon submission to lmtp/lda and on change via IMAP/POP3,

Yes.

...

or is the replication_full_sync_interval the only configurable for determining when the replication will occur?

No.

Timo, correct me if I am mistaken, but that keyword will tell the replication system when to apply a "dsync -f" aka running in "full sync mode" at latest.

...

Maybe a better question is there any documentation on dsync replication (could not find any)?

http://blog.dovecot.org/2012/02/dovecot-clustering-with-dsync-based.html http://www.dovecot.org/img/dsync-director-replication-ssh.png http://www.dovecot.org/img/dsync-director-replication.png

http://www.google.com/url?sa=t&rct=j&q=&source=web&cd=1&cad=rja&ved=0CDMQFjAA&url=http%3A%2F%2Fwww.linuxtag.org%2F2012%2Ffileadmin%2Fwww.linuxtag.org%2Fslides%2FTimo%2520Sirainen%2520-%2520What_s%2520new%2520in%2520Dovecot_.p269.pdf&ei=N1csUcqsLoTJsgbKuYD4CQ&usg=AFQjCNGoN4PBs-8lVYy1Gi_Dor03-n5tfQ&bvm=bv.42965579,d.Yms

(Sorry for the long link)

HTH, Michael

Thanks for the information Michael. I must be configuring this incorrectly as the replication is not occurring when messages are being delivered via LMTP in my setup. When I restart dovecot the messages are synced immediately, but not on delivery.

Here is my config:

# 2.2.rc2: /usr/local/etc/dovecot/dovecot.conf # OS: Linux 2.6.32-279.22.1.el6.x86_64 x86_64 CentOS release 6.3 (Final) auth_debug = yes auth_verbose = yes mail_debug = yes mail_location = maildir:~/Maildir namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = scheme=CRYPT username_format=%u /etc/dovecot/users driver = passwd-file } plugin { mail_replica = remote:vmail@mail2.clustertest.air replication_full_sync_interval = 1 hours } postmaster_address = root@clustertest.air service aggregator { fifo_listener replication-notify-fifo { mode = 0600 user = vmail } unix_listener replication-notify { mode = 0600 user = vmail } } service auth { unix_listener auth-userdb { mode = 0777 } } service config { unix_listener config { user = vmail } } service doveadm { user = vmail } service lmtp { process_min_avail = 20 unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } } service replicator { process_min_avail = 1 } ssl_cert =

On 2/26/13 10:10 AM, Timo Sirainen wrote:

On 26.2.2013, at 17.58, list@airstreamcomm.net wrote:

...

Thanks for the information Michael. I must be configuring this incorrectly as the replication is not occurring when messages are being delivered via LMTP in my setup. When I restart dovecot the messages are synced immediately, but not on delivery.

Here is my config: You're missing:

mail_plugins = notify replication

Thanks Timo that did the trick. Now say I have two clusters of dovecot servers in disparate data centers, each cluster has four nodes with shared NFS storage. Would I be able to configure dsync replication so that messages hitting any server in either cluster would be replicated accordingly to the remote data center?