[antirez]

Thanks for the in deep reply,

Exactly the logging process can well be a thread for better performances, thanks for the hint!

About the other scenarios where fsync will perform poorly, indeed every other I/O is going to be a problem.

I guess the "all the AOF business in a different thread" is the most sensible approach to follow probably, unless there is an (even Linux specific syscall) that is able to avoid blocking but just to force commit of old data.