Comment by _vvhw

Fantastic thread.

The history is also interesting. It's not that "macOS cheats", but that it sincerely inherited the status quo of many years, then tried to go further by adding F_FULLFSYNC. However, Linux since got better, leaving macOS stuck in the past and everybody surprised. It's a big problem.

Here's Dominic Giampaolo from Apple discussing this back in 2005, before Linux fixed fsync() to flush past the disk cache: https://lists.apple.com/archives/darwin-dev/2005/Feb/msg0008...

And here's TigerBeetle's Twitter thread with more of the history and how projects like LevelDB, SQLite and various language std libs were also affected: https://twitter.com/TigerBeetleDB/status/1422854779009654785