Sort of. The problem is fsync() is a rather blunt tool, forcing too much to be synchronised, reducing concurrency. I remember when ext4 was new there was debat

Sort of. The problem is fsync() is a rather blunt tool, forcing too much to be synchronised, reducing concurrency. I remember when ext4 was new there was debate about supporting atomic rename() without fsync(); see https://lwn.net/Articles/322823/ https://lwn.net/Articles/322823/