CAJ | 학술논문

可靠性较高的数据网格多采用双副本容灾可以保证节点在灾难发生时进行有效恢复,但由于节点数据存储量较大,当节点发生灾难时,从一个节点进行数据恢复速度较慢,导致在数据恢复期备份节点发生失效的概率较大.针对这些问题,本文给出一个容灾存储模型,基于该模型推导出一个数据失效模型,理论证明该失效模型的数据失效概率明显小于双副本容灾方式的数据失效概率,同时在灾难发生时又能达到较快的恢复速度.设计了仿真实验,将模型的数据失效概率与双副本失效概率进行了比较,实验结果与理论推导一致,证明了存储模型和数据失效模型的正确性和有效性.最后给出进一步研究思路.
가고성교고적수거망격다채용쌍부본용재가이보증절점재재난발생시진행유효회복,단유우절점수거존저량교대,당절점발생재난시,종일개절점진행수거회복속도교만,도치재수거회복기비빈절점발생실효적개솔교대.침대저사문제,본문급출일개용재존저모형,기우해모형추도출일개수거실효모형,이론증명해실효모형적수거실효개솔명현소우쌍부본용재방식적수거실효개솔,동시재재난발생시우능체도교쾌적회복속도.설계료방진실험,장모형적수거실효개솔여쌍부본실효개솔진행료비교,실험결과여이론추도일치,증명료존저모형화수거실효모형적정학성화유효성.최후급출진일보연구사로.
With double copies(DC) for Disaster-Toelerance, the data grid with higher reliability can ensure the effective re-covery.reduce the data failure probability(DFP) when the disaster occurs, and can provide greater network bandwidth. But because of the large data storage of the nodes, when the disaster occurs to the nodes, data recovery from one node is a little slow, which leads to the higher failure probability of the backup nodes during the data recovery period, therefore, the data failure probability gets higher.To solve these problems, a Disaster-Tolerant Storage Model(DTSM) is put forward, based on this model, a Data Failure Model(DFM) is built. Theoretical proof shows that the DFP of DFM is lower than that of DC and the recovery speed is faster when the disaster happens.To make a comparison between the data failure probabilities of two models, a simulating experiment is de-signed. The experimental result is consistent with the theoretical deduction, which proves that DTSM and DFM are correct and effec-tive. Finally a further research idea is proposed.