Not sure how HN works under the hood, so I have no real comparison. I also have no real reason to say it's not compatible beyond not thinking that locking primitives for a shared filesystem are likely inadequate. But I'm always open to being proven wrong. So, care to provide some good reading explaining why a FF system is more than adequate?

I don't know what you are trying to accomplish exactly, but it seems like you've convinced yourself that you need a more complex file storage mechanism. If you had listed any reason for this function, I might've understood. But, you didn't, so I had to ask. Here's 2 threads where this discussion has been had before:

https://news.ycombinator.com/item?id=5279440

https://news.ycombinator.com/item?id=7338923