Hi all,
I've had an interesting use case come up which - to cut the story short
- one way to solve the problem I am looking at may be to replicate a small number of mailboxes to a third remote server.
I've currently had replication running between my main dovecot machine and another remote VM for some time and working well (so I'm not new to replication and I've got a good working config), but I've a need to add a third to the mix for a select number of mailboxes. The arch on both of those is Gentoo x86_64 and with latest 2.1.16 -hg.
I have attempted this so far by rsync'ing the initial Maildirs and then once the bulk of the data has been transferred rely on dovecot's replication to keep things in sync. I figure that this should in theory mean that the subsequent updates in both directions are incremental and the bulk of the data gets moved while the device is here on my desk using rsync.
I've attempted to do this using a Raspberry Pi as a remote device, but when I set it up the dovecot replication process seems to need to start the replication over from scratch even after the rsync is done. I know this is happening as the disk utilisation on the Pi skyrockets once the replication starts and I end up with thousands of double ups of all the mails ... which defeats the entire point of the process.
If I do an identical configuration but on a third Gentoo x86_64 VM locally it all works as expected. No double ups of mails and the "catchup" between the two devices is practically instant. Same filesystem even. The only difference appears to be the system architecture.
So main my question is this. Is there a known architecture/endian limitation on replication? I guess cross-arch replication is not something many people try but is it supposed to work anyway?
Has anyone else got replication working across different arch's?
Also is there a way to restrict replication users aside from a crude hack around system first and last UIDs?
Thanks, Reuben