Doveadm backup...

[Ben Burk]

I'm not sure what you are attempting to do here. It looks like you just 
ran a doveadm backup and the process completed for userx with a warning 
that the remote system (your nfs mount) lost a particular mailbox 
(possibly your indexes changed or a mailbox was deleted). From the logs 
you pasted it appears the process completed normally.

I personally do not use dovecot's backup or replication processes. If I 
needed to I would use its replication process to sync active data 
between multiple systems, but I have no need for this as of yet. 
Personally I chose to create offsite backups using rsync a long time 
ago, as rebuilding a mailbox (reindexing) is very simple.

Try running            doveadm mailbox status -u userx guid '*'    as 
the mailbox administrator and see if you can find that GUID, 
7e05c335174bf1608f0a02004eac7fb4. Also, see if the backup you've written 
to nfs has the GUID.


On 2/27/22 23:33, Stephane Magnier wrote:
>
> Well no ..I thought that dsync was for synchro " realtime for 2 
> different places ?
>
> Having no 2 machines in parallel ( Just a single machine ) , I thought 
> that a backup at regular interval  would be enough ?
>
> So, a simple backup should be done by dsync finally ?
>
> Do you recommend finally NOT to do a backup ( Doveadm backup ) but a 
> replication process ? ( https://wiki.dovecot.org/Replication ) ?
>
> On 2/28/22 06:24, Ben Burk wrote:
>>
>> Did you try running dsync?
>>
>> On 2/27/22 23:15, Stephane Magnier wrote:
>>>
>>> HI,
>>>
>>> Any idea ? Any clue ?
>>>
>>> On 2/25/22 21:50, Stephane Magnier wrote:
>>>>
>>>> Hi
>>>>
>>>> I've recently tried to use the Dovecadm backup to backup the 
>>>> emails..  with the following syntax
>>>>
>>>> doveadm -Dv backup -u userx maildir:/mnt/nfs-backup/userx
>>>>
>>>> Sounds to be OK with few emails... Some of them got a lot of emails 
>>>> and one f them got an error and stop !
>>>>
>>>>     dsync(userx): Debug: brain S: Import Trash: Import change
>>>>     type=expunge GUID=1725fa475d774ee19cb98dfb6737b4f1 UID=24891
>>>>     hdr_hash= result=GUIDs match
>>>>     dsync(userx): Debug: brain S: Import Trash: Import change
>>>>     type=expunge GUID=916ed110b4b1522868be6194f1ae36ff UID=24892
>>>>     hdr_hash= result=GUIDs match
>>>>     dsync(userx): Debug: brain S: Import Trash: Import change
>>>>     type=expunge GUID=eb8d75c530a7b02fc26b494d9006c91b UID=24893
>>>>     hdr_hash= result=GUIDs match
>>>>     dsync(userx): Debug: brain S: Import Trash: Import change
>>>>     type=expunge GUID=aee9155875c34861fd6500f1f2f51a26 UID=24894
>>>>     hdr_hash= result=GUIDs match
>>>>     dsync(userx): Debug: brain S: Import Trash: Last common
>>>>     UID=24894. Delayed expunges=
>>>>     dsync(userx): Debug: brain S: Import Trash: Saved UIDs:
>>>>     dsync(userx): Debug: brain S: Import Trash: Finish update:
>>>>     min_next_uid=24895 min_first_recent_uid=24895
>>>>     min_highest_modseq=35344 min_highest_pvt_modseq=0
>>>>     dsync(userx): Debug:
>>>>     /mnt/nfs-backup/userx/.Trash/dovecot.index.cache: Compressed,
>>>>     file_seq changed 1645803588 -> 1645803589, size=32, max_uid=24894
>>>>     dsync(userx): Warning: Mailbox changes caused a desync. You may
>>>>     want to run dsync again: Remote lost mailbox GUID
>>>>     7e05c335174bf1608f0a02004eac7fb4 (maybe it was just deleted?)
>>>>     dsync(userx): Debug: auth-master: conn
>>>>     unix:/run/dovecot/auth-userdb: Disconnected: Connection closed
>>>>     (fd=10)
>>>>
>>>>
>>>> I empty the trash... exactly the same problem...
>>>>
>>>> Any idea why this ??
>>>>
>>>> Thanks and regards,
>>>>
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