Redundancy Does Not Imply Fault Tolerance: Analysis of Distributed Storage Reactions to Single Errors and Corruptions

We analyze how modern distributed storage systems behave
in the presence of file-system faults such as data
corruption and read and write errors. We characterize
eight popular distributed storage systems and uncover
numerous bugs related to file-system fault tolerance. We
find that modern distributed systems do not consistently
use redundancy to recover from file-system faults: a
single file-system fault can cause catastrophic outcomes
such as data loss, corruption, and unavailability. Our results
have implications for the design of next generation
fault-tolerant distributed and cloud storage systems.

Source: https://www.usenix.org/system/files/conference/fast17/fast17-ganesan.pdf

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