1、It is not equivalent to fsync — it's not a request to sync dirty data.
4、The aio_fsync() method serves the same purpose as the fsync() method; its purpose is to ensure that all pending data are written to disk.
2、它並不等於fsync函式——也不是請求同步髒資料。
3、aio_fsync()的目的與fsync()相同:確保所有未決的資料都寫入到磁碟了。