"While it may not be guaranteed by POSIX, operation 1's atomicity is nevertheless something any sane filesystme should provide."
That's very misguided. It's /not/ guaranteed by POSIX, and going "above and beyond" POSIX in every respect is a surefire recipe for terrible performance.
"While it may not be guaranteed by POSIX, operation 1's atomicity is nevertheless something any sane filesystme should provide."
That's very misguided. It's /not/ guaranteed by POSIX, and going "above and beyond" POSIX in every respect is a surefire recipe for terrible performance.