The 3-replica redundancy strategy is widely used to solve the problem of data reliability in large-scale distributed storage systems. However, its storage capacity utilization is only 33%. In this paper, a data placement algorithm based on fault-tolerant domain (FTD) is proposed. Owing to the fine-grained design of the FTD, the data reliability of systems using two replicas is comparable to that of current mainstream systems using three replicas, and the capacity utilization is increased to 50%. Moreover, the proposed FTD provides a new concept for the design of distributed storage systems. Distributed storage systems can take FTDs as the units for data placement, data migration, data repair and so on. In addition, fault detection can be performed independently and concurrently within the FTDs.
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We would like to express our sincere gratitude to Prof. DENG Dameng for providing guidance regarding the mathematical analysis in this paper.
Foundation item: the Science and Technology Project of Minhang District in Shanghai (No. 2018MH331)
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Shi, L., Wang, Z. & Li, X. Novel Data Placement Algorithm for Distributed Storage System Based on Fault-Tolerant Domain. J. Shanghai Jiaotong Univ. (Sci.) 26, 463–470 (2021). https://doi.org/10.1007/s12204-020-2253-5
- data reliability
- failure domain
- fault-tolerant domain
- data placement
- storage system
- distributed system
- TP 391