Journal
JOURNAL OF SYSTEMS ARCHITECTURE
Volume 118, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.sysarc.2021.102217
Keywords
Fault tolerance; Reliability; Mobile distributed system
Funding
- National Natural Science Foundation of China [61601067, 61802038, 62072059]
- Chongqing High-Tech Research Key Program, China [cstc2019jscx-mbdx0063]
- Chongqing Youth Talent Support Program, China
- China Postdoctoral Science Foundation [2017M620412]
- Funds for Chongqing Distinguished Young Scholars, China [cstc2020jcyj-jqX0012]
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The proposed MobileRE hybrid fault tolerance strategy combines erasure codes and replicas for a mobile distributed system, dynamically adjusting based on real-time network status to ensure data reliability and reduce system reliability cost rate.
Fault tolerance techniques are of vital importance to promise data reliability for mobile distributed system. In mobile environments, nodes suffer from high failure probability and fluctuating bandwidth. Thus, traditional fault tolerance techniques are no longer suitable. In this paper, we present a replica prioritized hybrid fault tolerance strategy combining erasure codes and replicas for a mobile distributed system (MobileRE), to guarantee data reliability with dynamic network status. In MobileRE, we first formulate a reliability cost rate to indicate the cost of ensuring data reliability of the mobile system. MobileRE further adaptively applies the erasure codes and replicas algorithms based on real-time network bandwidth status to minimize system reliability cost rate. MobileRE also obtains the optimal reliability cost rate by customizing redundant configuration parameters. The numerical and simulation results verify the effectiveness of the proposed schemes, and show that compared with traditional designs that only adopt erasure codes or replicas, MobileRE can significantly reduce the system reliability cost rate.
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