[Borgbackup] tag A or U when files are updated ?

[Ernest Chiarello]

Vielen Dank, Thorsten,

I'm not sure I fully understand what is written in the documentation... 
but i tried to add a new small file in the archive, as suggested. 😎

Le 02.09.21 à 13:01, Thorsten Schöning a écrit :
> You can make sure by creating an additional, small file in the backup
> source folder:
>
>> If you want to avoid unnecessary chunking, just create or touch a
>> small or empty file in your backup source file set (so that one has
>> the latest timestamp, not your 50GB VM disk image) and, if you do
>> snapshots, do the snapshot after that.

the new added file is passwd... the first backup (with passwd) takes the 
same time as the previous one: 2m34

root at kvm610:/var/lib/libvirt/backups/onlyoffice # time borg create 
--list /var/lib/libvirt/borgbackup/kvm610::essai6 
/var/lib/libvirt/backups/onlyoffice

U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-28_06:25:22.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-23_06:25:35.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-09-02_06:25:03.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-26_06:25:35.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-29_06:25:14.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-30_06:25:17.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-31_06:25:26.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-09-01_06:25:10.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-22_06:25:08.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-24_06:25:51.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-25_06:25:23.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-27_06:25:14.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-141702
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-131701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-121701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-111701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-101701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-091701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-081701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-071702
A /var/lib/libvirt/backups/onlyoffice/onlyoffice.qcow2
A /var/lib/libvirt/backups/onlyoffice/passwd
d /var/lib/libvirt/backups/onlyoffice

real    2m34,957s
user    1m44,797s
sys    0m12,468s

but the next backup is immediate: 0m07 !!

root at kvm610:/var/lib/libvirt/backups/onlyoffice # time borg create 
--list /var/lib/libvirt/borgbackup/kvm610::essai7 
/var/lib/libvirt/backups/onlyoffice
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-28_06:25:22.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-23_06:25:35.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-09-02_06:25:03.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-26_06:25:35.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-29_06:25:14.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-30_06:25:17.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-31_06:25:26.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-09-01_06:25:10.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-22_06:25:08.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-24_06:25:51.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-25_06:25:23.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice_2021-08-27_06:25:14.xml
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-141702
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-131701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-121701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-111701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-101701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-091701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-081701
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.bimg-20210412-071702
U /var/lib/libvirt/backups/onlyoffice/onlyoffice.qcow2
A /var/lib/libvirt/backups/onlyoffice/passwd
d /var/lib/libvirt/backups/onlyoffice

real    0m0,682s
user    0m0,454s
sys    0m0,146s

and the qcow2 file is tagged "U", as expected.

but I don't see how to avoid this type of problem when saving large 
files from time to time (qcow2 images)... 😕

What do you think ?


Ernest.

> https://borgbackup.readthedocs.io/en/stable/faq.html#i-am-seeing-a-added-status-for-an-unchanged-file
>
> Mit freundlichen Grüßen
>
> Thorsten Schöning
>
-- 
Ernest CHIARELLO - Ernest.Chiarello at univ-fcomte.fr

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