[donavanm]

I think the issues tatersolid has with linux aio is implicit dio. Thats really painful if youre working with hdd or high concurrent read scenarios. See my sibling comment for why.

That leads to people implementing “async io” threadpools in userland. Those threads then do “regular” blocking io which is able to use the page cache etc. having hundreds or thousands of blocking IO threads then causes lots of other perf/scheduling issues.