Backup technique

[Mondei1]

DocSort should offer the ability to backup all documents inclusive database into a cloud or on a external drive. There are some question open:

• Should be the backup encrypted?
• Which compression? (zip, gzip, xz, ..)
• Which file structure? Like this?

backup_24.02.2019.tar.gz
├── backup_meta.json
├── database.sqlite
└── documents
    ├── invoice_foobar_xxxxxxx.2.0.pdf
    └── reminder_to_pay_bill_xxxx.1.0.pdf

• Which meta data to save?
• Creation time of the backup (unix timestamp)
• More?
• Which cloud services we should support first?