On 21.8.2010, at 9.05, Luigi Rosa wrote:
> The replica is done via dsync with a procedure like this executed on
> mail1.acme.com server:
>
> foreach mailbox {
> dsync mirror mailbox
> }
>
> 1) Use Linux user/group owner of the files and directories are the same on
> both hosts (they are both foobar), but have different numeric ID, in one host
> foobat has UID 1234 and on the other host foobar has UID 2345. Is this an
> issue?
No. Just don't have your userdb specify the UID as a number (or at all, just
set a global mail_uid = foobar in config file).
> 2) Mail location path is the same on both hosts, but where does dsync get it?
> Does dsync get all the information from the userbase defined in dovecot.conf
> (and other included files)?
dsync reads the config the same way all other standalone programs (including
dovecot master) do it: it executes doveconf, which parses the config. Then if
you give -u parameter to dsync it also does userdb lookup from auth process.
> 3) Have I to scan the entire userbase and execute dsync for each user, or is
> there a trick to do for every user with a single command?
Currently you need to execute dsync separately for each user. It's also more
reliable since I think there are still some rare random crashes in dsync. If
you find these, let me know and I'll try to fix them. :) Also you should
probably be running a few dsyncs in parallel to finish the sync in less time.
> 4) How often is good to run the synchronization? 5 minutes? 10? 15?
Dunno. But see http://dovecot.org/list/dovecot/2010-August/051714.html
> 5) What is the correct command line to invoke dsync in this scenario?
Maybe simply: dsync mirror -u u...@domain mail2.acme.com
