Hi!
This question was answered as part of another conversation 1-2 years ago
however I totally forgot and due to its relative complexity I simply
wish to ask it again as to have it set in stone:
In OpenBSD's current absence of a Unified Buffer Cache, is there any
trick that I can apply to use a read-only mmap() for quickly reading
data, but fwrite() to do the writing, and this way get mmap's speed
benefits for the reading but still not be under any risk of breaking my
data by unintended writes?
I guess if it would be possible, then it would be done through that I
would ensure that the reading (via memory access) and writing (fwrite())
activities would be *temporally separated*, and between each such block,
I would need to put some kind of code that would do some kind of
flush/reset as to force the mmap to get updated with the latest writes.
Possible, if so how?
Thanks!
Tinker
