On: File systems unfit as distributed storage back end...

[zippie]

The GP may seem like sarcasm to some ... sqlite is an overlooked, novel, and faster way (up to 35%!) to store things than the filesystem [0].

You can use something like libsqlfs [1] for POSIX file heuristics with sqlite as the backing store.

One HA single primary/multi-master solution to use sqlite may be drbd.

[0] https://www.sqlite.org/fasterthanfs.html [1] https://github.com/guardianproject/libsqlfs