dovecot - Apr 2018 - Filesystem level backups?

Hello all,
Does doveadm backup - backup the attachments as well when using SIS ?

Regards
Durga Prasad
+919849111010


-----Original Message-----
From: dovecot [mailto:dovecot-bounces at dovecot.org] On Behalf Of Marc St?rmer
Sent: 09 April 2018 18:05
To: Steve Atkins
Cc: dovecot at dovecot.org
Subject: {Spam?} Re: Filesystem level backups?

Am 2018-04-09 00:55, schrieb Steve Atkins:
> Will a simple backup of all the files of an multi-dbox give me a 
> consistent state when I recover, or do I need to do something (e.g.
> lock writes to the mailbox) while I run a backup?
If you are doing this backup with a fully operational mail storage: no, it
won't. The reason is quite simple: mdbox saves the data of an email in
several files, so there's a good chance that those files might slightly
change during backup, while with Maildir all necessary data for the restore
is stored in the file names.

If you want to do a consistent backup, you do need file system snapshots and
should make sure that this snapshot is consistent or to turn off the mail
store during backup completely.

But just doing rsync on the fly as with Maildir is just begging on your side
to run into problems sooner or later...

--
Greetings,

Marc


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Le 4/9/2018 ? 4:56 PM, DurgaPrasad - DatasoftComnet a
?crit?:
> Hello all,
> Does doveadm backup - backup the attachments as well when using SIS ?
>
As far as I know, it does (it de-shares shared attachments)

I've used that solution to stop using SIS at one point (it created more 
problems than it solved - especially permission issues). I backup up all 
my mailboxes - then made them active - all attachments were back in the 
individual mailboxes.

--Ivan
(Again sorry for the duplicate)

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On 4/9/2018, 11:34:40 AM, Ivan Warren <ivan at vmfacility.fr>
wrote:
> Le 4/9/2018 ? 4:56 PM, DurgaPrasad - DatasoftComnet a ?crit?:
>> Does doveadm backup backup the attachments as well when using SIS? 
> As far as I know, it does (it de-shares shared attachments)
> 
> I've used that solution to stop using SIS at one point (it created
> more problems than it solved - especially permission issues)
Hi Ivan,

Mind if I ask for details?

(and maybe Aki or Timo):

I was considering implementing SIS on a new server I'm planning (won't
be for a few months now probably). I had decided against it a long time
ago because it was new, and there were drawbacks (backups not being
properly accounted for being one of the big ones). I was hoping it had
matured a lot since then and the drawbacks at the time were mostly
history. Maybe that is not the case?

If not, are there open bugs dealing with the issues, and plan for
addressing them? Or is SIs just probably not ever going to be ready for
prime time?