摘要
内存数据库的恢复系统是影响系统性能的一个重要的方面。现有的恢复机制在记录undo日志方面I/O比较频繁,事物和检查点进程操作并发度不高,造成系统效率不高。在前人研究的基础上,提出了一种改进的内存数据库恢复机制,重新定义了恢复过程中用到的部分数据结构,提出了改进的记录日志和检查点进程的算法。改进机制使得恢复的效率得到进一步的提高。
The recovery system of MMDB is an important aspect which influences the performance of the system. The current recovery system is not efficient because it frequently memorizes the I/O log and low currency between the transaction and the checkpoint in the process. Based on the researches carried out previously, this paper gives a method for improving the recovery performance, redefines some data structures used in the recovery process and points out an improved algorithm for writing logs and checkpoints. The improved mechanism enhances the recovery of MMDB to a higher lever.
出处
《电子科技》
2006年第6期56-58,共3页
Electronic Science and Technology
