Extending attributes page: a scheme for enhancing the reliability of storage system metadata |
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| Authors: | Juan Wang Dan Feng Fang Wang Cheng-tao Lu |
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| Institution: | (1) MOE Key Lab of Data Storage System, Huazhong University of Science and Technology, Wuhan, 430074, China |
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| Abstract: | 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.
Project 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), and the
Innovational Group Project (No. IRT0725), China |
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| Keywords: | Metadata server Metadata reliability Markov model Extending attributes page (EAP) |
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