Yeah, all filesystems are allowed to synchronize to disk as often as they want, in whatever way they want in /addition/ to what's specified. Filesystems can eve

Yeah, all filesystems are allowed to synchronize to disk as often as they want, in whatever way they want in /addition/ to what's specified. Filesystems can even make their own guarantees, above and beyond generalized specifications like fsync(). I could write a filesystem that synchronized files after every 42 megabytes, or once every 69 seconds. Apps might even come to depend on this behavior. All filesystems will have predictable, implementation dependent idiosyncrasies. But these aren't specified behaviors. They're not part of an interface and they shouldn't be depended on. The article implying that they ought to be is, I think, shortsighted. Other filesystems don't do this and your code will break if you assume it. I agree it's braindead.