fs.fdatasync(fd, callback)


    将与文件关联的所有当前排队的 I/O 操作强制为操作系统的同步 I/O 完成状态。 有关详细信息,请参阅 POSIX fdatasync(2) 文档。 除了可能的异常之外,没有为完成回调提供任何参数。

    Forces all currently queued I/O operations associated with the file to the operating system's synchronized I/O completion state. Refer to the POSIX fdatasync(2) documentation for details. No arguments other than a possible exception are given to the completion callback.