Bareos 21 and mariadb plugin and Accurate = yes in job definition.

[Jürgen Echter]

Hi,

first thanks for the new release!!

I just wanted to try out the new mariadb-plugin, i never used any plugin yet, and i got the following message in my incremental job: python-fd-mod: start_backup_job: Accurate backup not allowed please disable in Job

As i'm using always incremental scheme is this not going together with the mariabackup plugin?

Thanks for some enlightenment :)

Best regards

Juergen

[Andreas Rogge]

Hi Jürgen,

Am 24.12.21 um 09:58 schrieb 'Jürgen Echter' via bareos-users:

> I just wanted to try out the new mariadb-plugin, i never used any plugin
> yet, and i got the following message in my incremental job:
> python-fd-mod: start_backup_job: Accurate backup not allowed please
> disable in Job
>
> As i'm using always incremental scheme is this not going together with
> the mariabackup plugin?

the problem with AI and plugins (especially the database plugins) is
that we cannot produce a suitable new full backup on the server by
merging an older full + incrementals.

It is probably easiest to imagine that the full backup takes a snapshot
of the database and the incrementals only pick up the change-sets to
that snapshot.

So when we do a full backup on the client (i.e. no AI) we will get a new
snapshot.
However, doing a virtual full backup without the client (i.e. what
Consolidation does) you will get a new full backup that contains the
original snapshot and lots and lots of change-sets to that snapshot.

This would leave you with full backups that keep growing and - what is
even worse - with an awful performance on restore, as you'll restore
some ancient snapshot and the apply lots and lots of change-sets to that.

Hope that sheds some light on why this doesn't work.

Best Regards,
Andreas
--
Andreas Rogge andrea...@bareos.com
Bareos GmbH & Co. KG Phone: +49 221-630693-86
http://www.bareos.com

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