针对闪存缓冲区置换算法的性能验证基本采用仿真模拟的现状,提出了一种基于PostgreSQL的有说服力的性能验证方法,重点讨论了在PostgreSQL上扩展闪存缓冲区置换算法的方法和实现技术,并以CFLRU(clean first least recently used)和CCFLRU(cold clean first least recently used)算法为例,给出了具体的扩展过程.然后以一块固态硬盘作为数据存储设备进行性能测试,测试结果证明了基于PostgreSQL的扩展方法在缓冲区置换算法性能验证上的有效性.%Most of the flash-aware buffer replacement algorithms employ a simulation-based approach to measuring their performance. Therefore, this paper proposes an effective way to conduct performance analysis for flash-based database algorithms based on PostgreSQL. In particular, it focuses on the methods and implementation techniques to extend an added-on buffer algorithm on PostgreSQL. To exemplify the implemental details, two flash-aware buffer replacement algorithms are taken, namely CFLRU (clean first least recently used) and CCFLRU (cold clean first least recently used), as examples. Then a real solid state disk is used as storage device and the performance of CFLRU and CCFLRU is measured. The experimental results show that it is a feasible and effective way to extend a flash-aware algorithm on PostgreSQL and conduct performance measurement.
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