Thanks for the explanation. []'sf.rique
On Tue, Aug 3, 2010 at 11:57 AM, Timo Sirainen <t...@iki.fi> wrote: > On Tue, 2010-08-03 at 11:20 -0300, Henrique Fernandes wrote: > > > Like > > location1 is production. > > > > location1 has 1000 emails. > > > > I mirror it to location2 > > > > Now the owner of location1 deletes some emails! and have now 989 > > > > If i do mirroging again, it has to choose if it will copy back from > > location2 to location1 or erase mails in location2 > > > > How does it decide with one its going to do ? > > If mails are deleted in location1, mirroring causes the mails to be > deleted from location2 as well. If new mails are added to location2, > they are copied to location1. This is pretty easy to handle because in > IMAP the UID numbers always grow, so if you see UIDs 1,5,10 in location1 > and UIDs 1,10 in location2, you'll know that in location1 UID 5 was > deleted. UIDs at the end of the mailbox are then handled specially by > looking up from index files if they were actually deleted. And there is > some conflict checking also by looking message GUIDs. > > http://wiki2.dovecot.org/Design/Dsync has also some text about how the > syncing works internally. I should update it though.. > >
