use Tarsnap for my critical data. Case in point, I use it to backup my Bacula database dump. I use Bacula to backup my hosts. The database in question keeps track of what was backed up, from what host, the file size, checksum, where that backup is now, and many other items. Losing this data is annoying but not a disaster. It can be recreated from the backup volumes, but that is time consuming. As it is, the file is dumped daily, and rsynced to multiple locations.

I also backup that database daily via tarsnap. I’ve been doing this since at least 2015-10-09.

The uncompressed dump of this PostgreSQL database is now about 117G.