存储网格中数据高可靠获取的新编码方案  

Novel coding scheme for robust distributed data retrieval in storage grid

作　　者：徐公华[1] 邓善征[2] 杨军[2] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008 [2]空军工程大学工程学院,西安710038

出　　处：《计算机应用研究》2010年第5期1717-1719,共3页Application Research of Computers

基　　金：国家"863"计划资助项目(2008AA01A309)

摘　　要：为了保证存储网格中数据的高可获取性,提出了一种对数据资源进行RS编码和LT编码级联的新方法,使RS码和LT码互相促进,同时实现纠删和纠错,这是单独采用两种编码都无法达到的。仿真结果表明,RS-LT级联编码可提高LT码译码成功概率,能够以较小的系统代价大幅度提高数据的可获取性。In order to ensure data availability in storage grid,this paper proposed a novel concatenated code scheme that combined RS code and LT code for distributed data.The RS code and LT code promoted each other, realizing error correcting and erasure correcting at the same time,which was hard to be realized using any of RS code or LT code. The results of simulation indicate that the RS-LT concatenated code can improve the LT code correctly decoding probability and the scheme is effective in improving data availability with limited increase of system costs.

关 键 词：存储网格 数据获取 级联编码 译码概率 

分 类 号：TP302.8[自动化与计算机技术—计算机系统结构]