We are double compressing database:
First time at:
https://github.com/discourse/discourse/blob/master/lib/backup_restore/backuper.rb#L188
Second time at:
https://github.com/discourse/discourse/blob/master/lib/backup_restore/backuper.rb#L244
Instead this really should be a simple “tar file”, with the db added to it and then a bundle of compressed files.
backup.tar
- metadata
- database.compressed
- uploads_folder.compressed
This makes it ultra cheap to read metadata (since its at the head of the tar file) and means we also stop the double compression of database.