如何引导大缓存

缓存是指在计算机存储系统的层次结构中，介于中央处理器和主存储器之间的高速小容量存储器。缓存和主存储器一起构成一级存储器，高速缓冲存储器和主存储器之间信息的调度和传送是由硬件自动进行。在计算机的发展历程中，依据摩尔定律，计算系统中的中央处理器性能发展迅速。而磁盘作为计算系统中的主存储器，由于机械机理的限制，其发展速度远远不及中央处理器的发展速度，形成了中央处理器数据处理快而磁盘读写数据缓慢的状况，从而降低整个计算机系统工作效率。因此，通过在两者之间增加一个缓冲层来协调两者之间数据调动效率问题，缓存由此应运而生。缓存的处理速率接近于中央处理器，可以通过扩大缓存容量，缓解两者之间处理效率差距，能够快速响应中央处理器和磁盘之间的读写请求，作为两者之间的缓冲池，缓存在一个适当范围内越大越好。由于缓存资源的珍贵，因此，缓存成为一个计算系统性能高低的重要标志。

How to Guide the Big Cache

Cache,it is to point to in the hierarchical structure of the computer storage system,between the CPU and main memory of the small capacity storage at a high speed. Cache and main memory together form the primary memory,cache memory and scheduling information between main memory and is transmitted by the hardware automatically. In the development of computer,according to Moore's law,calculate the CPU performance of the system is developing rapidly. And disk as the main storage in computing system,as a result of the limitation of mechanical mechanism,its development speed is far less than the development speed of the CPU,formed the CPU data processing fast and slow disk read and write data,thereby reducing the entire computer system work efficiency. Therefore,by adding a buffer layer between the two coordinate data transfer between efficiency,cache which arises at the historic moment. Processing rates are close to the central processor cache,by expanding the cache capacity,alleviate processing efficiency gap between,can rapid response between the CPU and disk read and write requests,as between the buffer pool,cached in a proper range is bigger,the better. Due to cache the precious resources and,therefore,the cache become important symbol of a computing system performance.