https://bugs.kde.org/show_bug.cgi?id=479206
Bug ID: 479206
Summary: Large file missing from backup
Classification: Applications
Product: kbackup
Version: 23.08.4
Platform: Other
OS: Linux
Status: REPORTED
Severity: critical
Priority: NOR
Component: general
Assignee: kol...@aon.at
Reporter: pallasw...@proton.me
Target Milestone: ---
SUMMARY
I was performing a backup which includes three VM images - one ~1GB .iso, two
.qcow2 files, one 16GB and one 84GB in size.
On viewing the resulting archive from Kbackup, the other files all exist,
including two of the largest files (1GB and 16GB) but the 84GB file is nowhere
to be found. I watched Kbackup compress the file for some two hours (see
https://bugs.kde.org/show_bug.cgi?id=479204) and there is no error in the
output suggesting something went wrong, but the file is simply not there.
Looking at my previous backups which should include this file, it is not
present in any of them. So apparently I've never had a backup of this file, and
it's the primary reason I'm making this backup.
I thought that compressing 100GB of data down to a 6GB archive was impressive,
now I see how such a high ratio was achieved :D Jokes aside, this is pretty
bad. If there's anything I can do to assist, please do let me know, I would
like to help if I can.
STEPS TO REPRODUCE
1. Backup large files
2. Open archive
3. Note missing files
OBSERVED RESULT
File not included in backup archive
EXPECTED RESULT
File included in backup archive
SOFTWARE/OS VERSIONS
OpenSUSE Tumbleweed
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.113.0
Qt Version: 5.15.11
ADDITIONAL INFORMATION
System has 32GB of RAM. I don't see much memory usage, but obviously there is
some limit to the maximum file size that will be included, and I thought
perhaps it might be memory? That's just a random guess, though, I have no
indication that is the case.
The output from Kbackup, anonymized (replaced my username) and abbreviated (cut
out lots of lines of small (<1KB) files), to show that there are no errors
reported:
...Lots of small files...
/home/username/Documents/_NoCoW/_VM_Images
/home/username/Documents/_NoCoW/_VM_Images/Live_Install.qcow2 (16.8 GiB)
...compressing file
/home/username/Documents/_NoCoW/_VM_Images/Live_Install.qcow2
/home/username/Documents/_NoCoW/_VM_Images/obs-server.x86_64-qcow2_unmodified.qcow2
(84.1 GiB)
...compressing file
/home/username/Documents/_NoCoW/_VM_Images/obs-server.x86_64-qcow2_unmodified.qcow2
/home/username/Documents/_NoCoW/_VM_Images/openSUSE-Tumbleweed-KDE-Live-x86_64-Snapshot20230902-Media.iso
(908.6 MiB)
...compressing file
/home/username/Documents/_NoCoW/_VM_Images/openSUSE-Tumbleweed-KDE-Live-x86_64-Snapshot20230902-Media.iso
...Lots of small files...
...finished slice /run/media/username/Sandisk Pro/Kbackup/kbackup
libvirt_2023.12.31-06.53.35_1.tar
-- Filtered Files: 0
-- Backup successfully finished --
PS Happy New Year!
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