Issue Incremental backups - huge files

[mailworm]

Dear community,

can anyone explain the following to me?

-Environment-
Backups: Daily
Use incremental backup: Yes
Full backup: monthly
...
Backup of: Domain configuration, Email configuration and content, User files and User databases
Save in: /var/lib/psa/dumps

-Backup file situation-
Full backup: 13.8 GB
1. Incremental backup: +10.2 GB
2. Incremental backup: +10.3 GB
3. Incremental backup: +10.5 GB
4. Incremental backup: +10.5 GB
5. Incremental backup: +10.4 GB
...

In total at the moment the backups use 328 GB of my servers harddrive.

Honestly I can not imagine, that every day obviously 75% (10.x GB of 13.8 GB) of the files undergo changes and require to be stored in the new incremental backup?!?

Any idea anyone?

Thank You,
Thomas

 

[Sergey L]

Hi, quite likely that your project includes large database. Can you check that?
Database is always backed up as a whole, unlike files it cannot be separated in unchanged and modified parts.

 

[mailworm]

Hi Sergey,

no, all MySQL databases which were created for my projects have a total size of 253 MB only.

 

[IgorG]

Maybe this is due to active changes in Emails content, attaches, user files and so on?