Hacker News new | ask | show | jobs
by haydnv 1717 days ago
It might be possible to replace freqfs with mmap on a POSIX OS, but a) you would still have to implement your own read-write lock, and b) you would (I think probably?) lose some consistency in behavior across different host operating systems.
2 comments

Which OSes does this run on that doesn’t have some kind of mmap operation?
It should work on Windows (because tokio::fs works on Windows) although I have not personally tested this
You can do mmap on Windows, eg. https://github.com/danburkert/memmap-rs
mmaps for read, explicit API for writing, a-la LMDB. Buggy readers can read inconsistent data but cannot corrupt the os.
Corrupt the OS? How might that happen?
Sorry, I meant the DB!