WAL-G is a tool to backup databases and archive database write ahead to cloud storage, providing Point in Time Recovery. It is stable for PostgreSQL and with beta support for MySQL, MariaDB, MongoDB, and Redis. My snap only builds for PostgreSQL at the moment. It is the successor to wal-e, which is already snapped. And similarly to wal-e, requires classic confinement. The tool is invoked by PostgreSQL when WAL files need to be shipped off the server, and these are located at an arbitrary location on the filesystem. WAL-G is also used to backup and restore the PostgreSQL database files themselves. By default this is all under /var/lib/postgresql in a standard Debian install, but it is very common for this to be changed to multiple other disk partitions for performance and scaling reasons.