Backup : difference sizes between yunohost admin, console, sftp

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I noticed something “space” (strange) about the management of archives
If I look at the size of my backup via yonohost web admin, for the same archive, it does not correspond to those of a console or data via sftp.
Example:
Via the yunohost web client, the archive is 883 Mb

Via the console it makes 447M

/home/yunohost.backup/archives$ ls -lah
total 447M
drwxr-x--- 2 admin root 4.0K Jul 21 16:22 .
drwxr-xr-x 4 root  root 4.0K Jun 26 22:53 ..
-rw-r--r-- 1 root  root 2.3K Jul 21 16:18 20190721-141630.info.json
-rw-r--r-- 1 root  root 447M Jul 21 16:18 20190721-141630.tar.gz

And via sftp, it is 467.7Mo


I would say that the console is right, but …
Why this difference

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J’ai remarqué une chose bizarre au niveau de la gestion des archives
Si je regarde la taile de mon backup, pour une même archive, elle ne correspond pas à celles d’une console ou des données via sftp.
Exemple:
Via le client web yunohost, l’archive fait 883 Mb
Via la console elle fait 447M
Et via sftp, elle fait 467,7Mo (cf image)

Pourquoi cette différence ?
Je dirais que c’est la console qui a raison, mais bon…

I don’t know about the size of the archive via the web interface.

But for the ones via the console and sftp, it is most probably because the console is using a binary prefix and the sftp client is using a SI prefix (metric).

467,7MB * 1000^2 / 1024^2 = 446,033MiB

MB is megabyte and MiB mebibyte.

Source : https://en.wikipedia.org/wiki/Octet_(computing)

Both are right : the console size / file explorer size shows the compressed size whereas the admin shows the uncompressed size (which you may see inside the info.json)

Maybe the admin should find a more explicit way to display this tho (in fact both infos are relevant to know probably…)

2 Likes

thank you for the clarification
It’s true that this is not explicit the web admin panel data :wink:
Maybe to put the 2 values ​​would be more readable;)

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