Have a look at libeatmydata - https://github.com/stewartsmith/libeatmydata https://github.com/stewartsmith/libeatmydata Things will still get written to disk e

Have a look at libeatmydata - https://github.com/stewartsmith/libeatmydata https://github.com/stewartsmith/libeatmydata Things will still get written to disk eventually, it's just that fsync() returns instantly without actually doing anything. It's sometimes used in CI and similarly-ephemeral systems, and can produce a noticeable reduction in i/o. Be warned, though, that it has that name for a reason!