层次化通信网络数据库容灾备份方法仿真  

Simulation of Disasterrecovery Backup Method for Hierarchical Communication Network Database

作　　者：时培胜[1] SHI Pei-sheng(East University of Heilongjiang,Harbin Heilongjiang 150066,China)

机构地区：[1]黑龙江东方学院

出　　处：《计算机仿真》2019年第5期222-225,299,共5页Computer Simulation

摘　　要：针对当前方法数据库容灾备份成本高的缺点,提出基于链式描述符的层次化通信网络数据库容灾备份方法。通过计算网络运行数据的相对熵值,分析通信网络数据的分布情况,并对通信网络流中数据的冗余情况做分析,计算层次化通信网络数据库冗余数据消除的错误率,与计算结果相结合,消除网络中的冗余数据。在此基础上,分析通信网络数据文件读写外的耗时与数据传输外消耗之间的关系,利用数据块的总数量和有效数据块的数量计算数据备份中数据拷贝程序的所用时间,得到数据文件缓存区域的上限,利用链式描述符来分析数据备份的三种情况,并计算每种情况数据备份需要的时间,根据数据块的副本量等条件计算通信网络数据备份的成本,得到通信价格,利用链路数量计算通信网络数据库容灾的恢复时间,最终实现了层次化通信网络数据库容灾备份。结果表明,提出方法在对通信网络数据库容灾备份时,不仅备份成本低,数据库的恢复时间也短,具有有效性和可行性。This article presents a method for disaster recovery replica of database of hierarchical communication network based on chained descriptor.Our research analyzed distribution situation of communication network data via calculating relative entropy of network operating data and redundancy situation of data in communication network flow.The research calculated error rate of elimination of redundant data of the database and eliminated the redundant data integrated with the calculation results.On that basis,the research analyzed the relation between read-write time consumption of data file of the communication network and consumption of data transmission.The research used total quantity of data block and quantity of valid data block to calculate time of data copy program in data replica and obtained upper limit of cache region of data file.Our research analyzed three situations of the data replica via the chained descriptor and calculated time of each situation.The research calculated cost of the data replica according to replication quantity and obtained communication price.The research calculated time of the disaster recovery via link quantity.Thus,we achieved the disaster recovery replica.Results show that the method has not only low replica cost,but also short database recovery time.It has validity and feasibility.

关 键 词：层次化 通信网络 数据库 容灾备份 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]