First, the structure of RTDBMS is introduced briefly. Then, the method,which make a disk file access asynchronously and quickly by using dual buffers of fixed length, is proposed,and the read and write algorithms used to realize the method are presented.

• 本文首先简述RTDBMS的结构特点，然后着重介绍利用固定长双缓冲区实现磁盘文件快速异步读写的方法，并给出实现这一方法的异步读写算法。