On Thu, 2025-05-08 at 22:22 -0700, ToddAndMargo via users wrote: > On 5/8/25 5:43 PM, Samuel Sieb wrote: > > On 5/8/25 5:22 PM, ToddAndMargo via users wrote: > > > On 5/8/25 4:57 PM, Samuel Sieb wrote: > > > > On 5/8/25 4:54 PM, ToddAndMargo via users wrote: > > > > > Fedora 41 > > > > > borgbackup-1.4.1-1.fc41.x86_64 > > > > > > > > > > In my testing an hot to write up I made myself of borg > > > > > backup, I found something confusing. > > > > > > > > > > I backed up three file and restored them (somewhere else). > > > > > The sha256sum matched the originals but the du's did not. > > > > > What am I missing? > > > > > > > > I'm guessing that the backup program doesn't handle sparse files. > > > > > > > > The checksum will match because the empty space is zeroed either way. > > > > > > > > > > Thank you! > > > > > > My read is that if the check sum matches, the file is perfect. > > > But, I wanted to double check in case I was missing something. > > > > The file is equivalent. It just takes up more disk space. :-) > > > > > As a test, now that dump/restore is working again, I backed up > a sparse file and restored: > > Sparse file backups and restored with dump/restore: > # du --bytes * > 104857600 sparseFile > 104857600 sparseFile.orig > > # du --block-size=1 * > 0 sparseFile > 0 sparseFile.orig > > # sha256sum * > > 20492a4d0d84f8beb1767f6616229f85d44c2827b64bdbfb260ee12fa1109e0e sparseFile > > 20492a4d0d84f8beb1767f6616229f85d44c2827b64bdbfb260ee12fa1109e0e > sparseFile.orig > Borg is incapable of the same result. And I am backing up > a lot of qamu-kvm virtual drives. They are sparse files and > large. If borg can not deal with sparse files, then it is not > a good candidate for replacing dump/restore. Bord > will give back equivalent files that are much larger. I don't run Borg on my VM images. If I want to back up a VM I'll use the VM's own backup system internally. However this might be of interest: https://borgbackup.readthedocs.io/en/stable/deployment/image-backup.html poc -- _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
