On 10/18/2022 7:46 PM, Steve Litt wrote:
On Tue, 2022-10-18 at 16:48 +0200, Bernardo Reino wrote:
On 18/10/2022 12:17, Michael wrote:
>
> [...]
so, raid is mandatory, which is already the case, but what about backup?
how can i achieve a backup/snapshot of both, the mdbox (nfs share) and
the index files (local raid) and assure they are consistent?
You can use doveadm to backup the mailboxes, which should work correctly
even in a live system.
My backup "strategy" (hopefully it deserves that name) is to weekly run
something like:
for MAILBOX in $USERS; do
doveadm expunge -u "$MAILBOX" mailbox Trash savedbefore 7d
doveadm expunge -u "$MAILBOX" mailbox Spam savedbefore 30d
doveadm purge -u "$MAILBOX"
LOCATION2="mdbox:/srv/snap_mail/$MAILBOX/mdbox"
doveadm -v backup -u "$MAILBOX" -P "$LOCATION2"
done
Do you think the preceding shellscript will work if I store my Dovecot messages
in
the Maildir form?
Thanks,
SteveT
Yes it will. The source format is your current format (maildir) and the
target format is whatever you specify (mdbox: or maildir:)
I do something similar with my daily backups using dsync. Like others, I
was hesitant about using mdbox in the beginning and my solution was to
create my point in time backups in maildir format.
for user in $users; do
dsync -u ${user} backup maildir:/home/$user/.mailbkup/mailboxes
done
This is a simplified version of my command. In my backup script this
runs inside another loop to make backups for all users in parallel, but
I only have about 20 users and plenty of excess CPU on my server. I run
this about 4 times per day to sync changes to my backup copy. Once the
initial sync is done the incremental changes run pretty quickly.
Doug
