"Original size" of backup is twice that of the source folder

[kaysond]

Summary

Doing a backup of a ~56GB folder yields an "Original Size" of 109GB, a "Compressed Size" of 96.99GB and a "Deduplicated Size" of 53GB. There is no other backup with this prefix, and all other backups from this source were deleted prior to the test.

It may just be a reporting error, but its still concerning that compressed size is significantly larger than the original, and deduplicated is only slightly smaller, especially given the zstd compression.

Have you checked borgbackup docs, FAQ, and open Github issues?

Yes

Is this a BUG / ISSUE report or a QUESTION?

Issue

System information. For client/server mode post info for both machines.

Client: Custom AMD Desktop PC
Server: Raspberry Pi 3B

Your borg version (borg -V).

Client: 1.1.5
Server: 1.1.8

Operating system (distribution) and version.

Client: Ubuntu 18.04.2
Server: Raspbian 9.9

Hardware / network configuration, and filesystems used.

Sent over the internet via ssh (default ssh options)
Filesystem is ext4 on both ends

How much data is handled by borg?

500GB de-duped

Full borg commandline that lead to the problem (leave away excludes and passwords)

See below

Describe the problem you're observing.

The reported "Original size" of the archive after backup is nearly twice the size of the actual contents of the directory that was backed up

Can you reproduce the problem? If so, describe how. If not, describe troubleshooting steps you took before opening the issue.

This consistently happens with all backups to varying degree

Include any warning/errors/backtraces from the system logs

administrator@fserver:/var/www/files/Backups/Aram$ du -sh /var/www/files/Backups/Aram/WindowsBackup
56G     /var/www/files/Backups/Aram/WindowsBackup
administrator@fserver:/var/www/files/Backups/Aram$ sudo -H offsite-backup create aramdesk /var/www/files/Backups/Aram/WindowsBackup/
administrator@fserver:/var/www/files/Backups/Aram$ sudo -H offsite-backup info -P aramdesk
Archive name: aramdesk-2019-06-28T14:12:11
Archive fingerprint: cb12b51e42d43e77b1e917dc640572372085eb25750ea6fa04b66adc20518ece
Comment:
Hostname: fserver
Username: root
Time (start): Fri, 2019-06-28 14:12:17
Time (end): Fri, 2019-06-28 21:45:22
Duration: 7 hours 33 minutes 4.65 seconds
Number of files: 11530
Command line: /usr/bin/borg create --verbose --compression zstd,10 '::aramdesk-{now}' /var/www/files/Backups/Aram/WindowsBackup/
Utilization of maximum supported archive size: 0%
------------------------------------------------------------------------------
                       Original size      Compressed size    Deduplicated size
This archive:              109.00 GB             96.99 GB             53.75 GB
All archives:              566.50 GB            434.57 GB            356.77 GB

                       Unique chunks         Total chunks
Chunk index:                  996558              1152685

Note offsite-backup just sets envvars and calls borg with some added params

[ThomasWaldmann]

This is a cosmetic bug, search for the existing ticket (closing this as duplicate).

[kaysond]

@ThomasWaldmann you mean #3224? I saw that but it appeared to have been patched in 2017 and 1.1.5 was released long after...

[ThomasWaldmann]

#3522

#3690

#3736

#4329

[kaysond]

Thank you. Explains why searching for "original size" didn't come up with any results. In any case, upgrading to v1.1.10 on client and server resolved the issue.