I don't disagree, necessarily, but ACID[0] is/was quite expensive for (usually) marginal gain. These days, I'm sure it could be done a lot more efficiently (wit

I don't disagree, necessarily, but ACID[0] is/was quite expensive for (usually) marginal gain. These days, I'm sure it could be done a lot more efficiently (with SSDs and such), but the fact is that there's no real way to do it using just POSIX syscalls. Applications literally cannot 'signal' transaction boundaries wrt. file system writes as it is. The APIs simply aren't there. [0] Well, not exactly, but you get the idea.