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- W4313555219 abstract "Erasure coding has been extensively deployed in today's data centers to tackle prevalent failures, yet it is prone to substantial cross-rack traffic for parity updates. In this article, we propose a new rack-coordinated update mechanism to suppress the cross-rack update traffic, which comprises two successive phases: a delta-collecting phase that collects data delta chunks, and another selective parity update phase that renews the parity chunks based on the update pattern and parity layout. We further design <inline-formula><tex-math notation=LaTeX>${sf RackCU}$</tex-math></inline-formula> , an optimal rack-coordinated update solution that achieves the theoretical lower bound of the cross-rack update traffic. We also perform reliability analysis, demonstrating that <inline-formula><tex-math notation=LaTeX>${sf RackCU}$</tex-math></inline-formula> can attain a lower data loss probability via shortening the update procedure. We conduct extensive evaluations, in terms of large-scale simulation and real-world data center experiments. We show that <inline-formula><tex-math notation=LaTeX>${sf RackCU}$</tex-math></inline-formula> can reduce 16.5-77.1% of the cross-rack update traffic and hence improve 24.9-772.0% of the update throughput." @default.
- W4313555219 created "2023-01-06" @default.
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- W4313555219 date "2023-01-01" @default.
- W4313555219 modified "2023-10-16" @default.
- W4313555219 title "Optimal Rack-Coordinated Updates in Erasure-Coded Data Centers: Design and Analysis" @default.
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- W4313555219 doi "https://doi.org/10.1109/tc.2023.3234215" @default.
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