Incremental Backup, but Bareos read and write all files to backup like a Full backup.

[Ireneusz Piasecki]

Hi.

I installed the latest version for Windows (community native installation) : serwer2022-fd Version: 24.0.0~pre1549.892dd4d5e (16 December 2024) VSS Microsoft Windows Server 2012 Standard Edition (build 9200), 64-bit

Then, my incremental job running right now - read all files from data catalogs and write them all, as this were a Full backup job.

How bares-fd knows, that all these files changes and he must backup them all? Usually my Incremental jobs last few seconds backup only changed files. Now, incremental backup backup all files.

I checked, structure of catalogs with data not changed.

Best regards.

I.Piasecki

[Philipp Storz]

Hello,

can you please provide more information:

Did you change the fileset between the full and the incremental backup?

How are the job and the fileset defined?

Can you provide the job logs of the full and the incremental backup?

Best regards,

Philipp



Am 19.12.24 um 10:29 schrieb Ireneusz Piasecki:

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Mit freundlichen Grüßen

Philipp Storz philip...@bareos.com
Bareos GmbH & Co. KG Phone: +49 221 63 06 93-92
http://www.bareos.com

Sitz der Gesellschaft: Köln | Amtsgericht Köln: HRA 29646
Geschäftsführer: Stephan Dühr, Jörg Steffens, Philipp Storz

Die "dass IT GmbH" wurde mit der "Bareos GmbH & Co. KG" verschmolzen,
siehe https://www.bareos.com/de/dassit-verschmelzung/

[Philipp Storz]

>
> At last i have one fundamental question:
>
> How does bareos-fd know that these particular files have changed since the last incremental backup
> and must include them in the next one? Incremental backups are very fast because the incremental
> backup only includes changed files.
Bareos checks the timestamps of the files to determine if they have changed since the last backup.

With Accurate backup, it compares the list of files that have been backed up in the previous backups
and compares the name and optionally other properties of the files to determine whether the files
have changed or not.

Please read the docs for more details

https://docs.bareos.org/Configuration/Director.html#config-Dir_Job_Level

https://docs.bareos.org/Configuration/Director.html#config-Dir_Job_Accurate
https://docs.bareos.org/Configuration/Director.html#config-Dir_Fileset_Include_Options_Accurate

>
> To include one file in an incremental backup, bareos-fd does not check every file, this would take
> too long with a large number of files. So how does bareos-fd know which files to include?
>
> I.Piasecki