基于元素树的异质数据库间双向转换算法研究

Research on Bidirectional Conversion Algorithm Between Heterogeneous Databases Based on Element Tree

为提升异质数据库双向转换效果,提升数据双向转换的安全性,研究基于元素树的异质数据库间双向转换算法。在异质数据库内引入概率数值,建立概率关系数据模型与概率可扩展标记语言数据模型,精准刻画异质数据库内数据的结构特性;依据元素树建立元素树与两个概率数据模型间的映射关系,并生成映射表;依据映射表内的映射关系实现两个概率数据模型间的双向转换。仿真结果表明,上述算法可有效完成异质数据库间的双向转换;在交易发送频率分别为600笔/s、400笔/s时,上述算法双向转换时的查询性能与写入性能达到最优;在不同恶意节点概率并承受不同攻击情况下,该算法双向转换的安全性较高。

In order to improve the effect of bidirectional conversion between heterogeneous databases and improve the security of data bidirectional conversion,this article studied a bi-directional conversion algorithm between hetero-geneous databases based on element tree.At first,probability numeral values were introduced into heterogeneous data-bases.And then,a probability relation data model and a probabilistic extensible markup language data model were built to accurately describe the structural characteristics of the data in heterogeneous databases.Moreover,the mapping relationship between the element tree and the two probability data models was established,and the mapping table was thus generated.Finally,the bidirectional conversion between two probability data models was realized by the mapping relationship in the table.Following conclusions can be drawn from the simulation results.The proposed algo-rithm can effectively complete the bidirectional conversion between heterogeneous databases.When the transmit fre-quency of the transaction is 600/s and 400/s respectively,the algorithm achieves optimal query performance and write performance.In addition,the bidirectional conversion of the algorithm has higher security under different proba-bilities of malicious nodes and under different attacks.