Unable to backup application

[kri164]

• App build number: Version 2.4.2 (24208) - OSS
• Android version: Android 11 (Lineage OS 18.1 2021/10/15)
• Device: Xiaomi Redmi Note 9 Pro

Hello all,

Im unable to backup Owntracks application. Lineage OS comes with included SeedVault Backup (solution from Calyx Institute).
https://calyxinstitute.org/projects/seedvault-encrypted-backup-for-android

Error is "quota exceed". Searching on internet point me to android backup limits 25 MB (or 50 MB maybe) for application data suitable for backup.

Owntracks has 37 MB app and 82 MB userdata on my device after installation and few days of usage.
Nexttracks (fork of Owntracks) has only 17 MB app and 2MB userdata on same device.

Can I ask some kind developer to look at https://developer.android.com/guide/topics/data/autobackup
and exclude some files from backup in app source code via <exclude> elements :

android/project/app/src/main/res/xml/backup_descriptor.xml

Thank you very much for your great app
Petr

[growse]

I'll look into this - sounds like it should be a quick fix, although I'm not sure why the userdata should be 82MB. I'll check on some other devices and see what's pushing this size.

[kri164]

Yes. I glad to know, what eated the place.
I can try adb shell command, but dont know, where to look and how to find it. Any advice is welcome.
Regards

[growse]

Ah, just noticed you're on the OSS version. I wonder if the cached map tiles are counting towards the user data space?

[growse]

Hah, yes, I just scolled around a lot on my OSM version and the User data jumped up to 43MB from about 10MB. I'll test adding an exclude for that path.

[kri164]

Found it.

# du -h /data/data/org.owntracks.android/files/osmdroid/tiles/cache.db
82M /data/data/org.owntracks.android/files/osmdroid/tiles/cache.db

Maybe we can exclude tiles directory from backup.

Thank you

[growse]

Will be in 2.4.3

[growse]

Was just looking at the implementation here, I wonder if a better approach would be to get osmdroid to cache its tiles in the cacheDir() rather than the user data? So that would be /data/data/org.owntracks.android/cache/ rather than /data/data/org.owntracks.android/files.

I did some quick adb backup testing and it looks like it doesn't capture the cache dir in the backup, so I might try this initially, rather than trying to exclude paths from the backup.

[kri164]

If you will release beta 2, I will test it and will report results.
If not, I will wait to final 2.4.3 and will report too :-)
Thank you.

[growse]

Soon! Just a couple of things I want to tick off, then there'll be a new beta.

[kri164]

I would like to report that backuping of app is working now.
Thank you very much.