最大化系统可靠性收益的资源分配方案

针对现有存储资源分配方案存在的不足,首先引入优先级比重的概念,充分考虑了文件大小和文件重要性对系统可靠性收益的影响,然后在此基础上建立了一种非线性整数规划模型,最后求解得出了能够使得系统可靠性收益最大化的最优资源分配方案。实验结果表明,相比贪婪算法分配方案而言,在给定相同大小的存储容量情况下,提出的资源分配方案能够获得更高的系统可靠性收益。

Resource allocation scheme for maximizing system reliability return

Current resear ches on reliability o f storage systems mainly focus on data redundancy methods but rarely pay at tent ion to storag e capacity allocation for max imizing sy stem reliability return. In order to overcome the def iciencies of the ex ist ing sto rage resour ce allocat io n st rateg ies, a co ncept called priority density w as f irst ly int roduced and w as defined as the r at io o f f ile prior ity to file size. Based on this, a nonlinear integ er prog ramming mo del w as proposed. Finally , an optimal resour ce allocat ion scheme w hich co uld max imize the system r eliabil ity return w as f igured out . Ex perimental resul ts indicate that this resource scheme compar ed favorably to the greedy algo rithm can attain a much hig her sy stem r eliability return under the same amount of g iv en storage capacity