CAJ | 학술논문

　　建立独立于具体算法的复本存储模型，识别影响效率的关键参数和无关参数；分析系统规模增长对效率的影响，通过实验得出空间效率与I/O效率的乘积同系统节点数量近似成反比这一结论，并从理论上解释结论背后的成因。研究结果可用于指导复本存储机制的工程应用，为空间效率和I/O效率之间的权衡以及大规模存储系统I/O性能的预测提供理论依据。
　　건립독립우구체산법적복본존저모형，식별영향효솔적관건삼수화무관삼수；분석계통규모증장대효솔적영향，통과실험득출공간효솔여I/O효솔적승적동계통절점수량근사성반비저일결론，병종이론상해석결론배후적성인。연구결과가용우지도복본존저궤제적공정응용，위공간효솔화I/O효솔지간적권형이급대규모존저계통I/O성능적예측제공이론의거。
An algorithm-independent description model was established for the mechanism, and both efficiency-related and efficiency-independent parameters were identified. Besides, the impact of system scale on efficiency was investigated, and an important observation was obtained that the product of the two utilization ratios (i.e., the utilization ratio of disk space and that of I/O bandwidth) is approximately inversely proportional to the number of nodes contained in the system. The observation was verified through experimental results, and the reason behind was revealed through theoretical analy-sis. The study provides guidelines for the application of replication-based storage mechanism in engineering, and lays a theoretical foundation for the trade-off between the two utilization ratios and for the prediction of I/O performance in large-scale storage systems.