Data Backup Size vs Actual Data Size

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1

Hello All,

I have been testing NC for a couple months, and really appreciate the application. I am doing some final tests. I noticed the backup size(8.7G) is significantly less than the size of the docker nextcloud_aio_nextcloud_data volume(54G). Is this normal?

I may have some duplicates but the difference seems more significant than I would expect. Reviewed some posts and it seems it should be at or close to 1:1. I did a restore of the backup, the docker volume size is 54G. The biggest folder is a Seedvault Android backup of about 48G.

2

I mean if there is a lot of data that can be compressed and deduplicated, it does not sound unreasonable. Can you post the borgbackup container logs here after creating a backup?

3

Thanks for the reply. Log below from a recent backup

Performing backup...
Starting the backup...
Creating archive at "/mnt/borgbackup/borg::20240213_171225-nextcloud-aio"
------------------------------------------------------------------------------
Repository: /mnt/borgbackup/borg
Archive name: 20240213_171225-nextcloud-aio
Archive fingerprint: 66ebb71993c8d061eac990fcaad385cdfe317c23241dc9fa126e091a3e506c33
Time (start): Tue, 2024-02-13 17:12:26
Time (end):   Tue, 2024-02-13 17:12:50
Duration: 23.72 seconds
Number of files: 74664
Utilization of max. archive size: 0%
------------------------------------------------------------------------------
                       Original size      Compressed size    Deduplicated size
This archive:               60.69 GB             44.52 GB             50.13 MB
All archives:              422.94 GB            309.81 GB              9.34 GB

                       Unique chunks         Total chunks
Chunk index:                   69331               681078
------------------------------------------------------------------------------
BORG_PRUNE_OPTS are --keep-within=7d --keep-weekly=4 --keep-monthly=6
Pruning the archives...
------------------------------------------------------------------------------
                       Original size      Compressed size    Deduplicated size
Deleted data:                    0 B                  0 B                  0 B
All archives:              422.94 GB            309.81 GB              9.34 GB

                       Unique chunks         Total chunks
Chunk index:                   69331               681078
------------------------------------------------------------------------------
Compacting the archives...
Backup finished successfully on 13.02.2024 - 17:12:54 (00 hours 00 minutes 29 seconds).
4

Looks fine I’d say :slight_smile: