Optimistic File System (OptFS) Implements Optimistic Crash Consistency (2013)

https://pages.cs.wisc.edu/~vijayc/optfs.htm https://sigops.org/s/conferences/sosp/2013/papers/p228-chida... https://research.cs.wisc.edu/adsl/Publications/optfs-sosp13-...

Applicable to https://news.ycombinator.com/item?id=38378557 as it provides a separate system calls: osync for ordering and dsync for durability. The durability has the same granularity as fsync.