Extending attributes page:a scheme for enhancing the reliability of storage system metadata  

作　　者：Juan WANG Dan FENG Fang WANG Cheng-tao LU 

机构地区：[1]MOE Key Lab of Data Storage System, Huazhong University of Science and Technology, Wuhan 430074, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2009年第8期1106-1113,共8页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：supported by the National Natural Science Foundation of China (No.60873028);the National Basic Research Program (973) of China (No.2004CB318201);the Program for New Century Excellent Talents in University (No.NCET-04-0693);the Innovational Group Project (No.IRT0725),China

摘　　要：In an object-based storage system,a novel scheme named EAP(extending attributes page) is presented to enhance the metadata reliability of the system by adding the user object file information attributes page for each user object and storing the file-related attributes of each user object in object-based storage devices.The EAP scheme requires no additional hardware equipments compared to a general method which uses backup metadata servers to improve the metadata reliability.Leveraging a Markov chain,this paper compares the metadata reliability of the system using the EAP scheme with that using only metadata servers to offer the file metadata service.Our results demonstrate that the EAP scheme can dramatically enhance the reliability of storage system metadata.In an object-based storage system, a novel scheme named EAP （extending attributes page） is presented to enhance the metadata reliability of the system by adding the user object file information attributes page for each user object and storing the file-related attributes of each user object in object-based storage devices. The EAP scheme requires no additional hardware equipments compared to a general method which uses backup metadata servers to improve the metadata reliability. Leveraging a Markov chain, this paper compares the metadata reliability of the system using the EAP scheme with that using only metadata servers to offer the file metadata service. Our results demonstrate that the EAP scheme can dramatically enhance the reliability of storage system metadata.

关 键 词：Metadata server Metadata reliability Markov model Extending attributes page （EAP） 

分 类 号：TP333[自动化与计算机技术—计算机系统结构] TB114.3[自动化与计算机技术—计算机科学与技术]