On the performance and convergence of distributed stream processing via approximate fault tolerance
On the performance and convergence of distributed stream processing via approximate fault tolerance
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基于近似容错的分布式流处理的性能和收敛性
DOI:
10.1007/s00778-019-00565-w
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发表时间:
2018-11
期刊:
影响因子:
4.2
通讯作者:
Patrick P. C. Lee
中科院分区:
文献类型:
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作者:
Zhinan Cheng;Qun Huang;Patrick P. C. Lee
Fault tolerance is critical for distributed stream processing systems, yet achieving error-free fault tolerance often incurs substantial performance overhead. We presentAF-Stream, a distributed stream processing system that addresses the trade-off between performance and accuracy in fault tolerance. AF-Stream builds on a notion calledapproximate fault tolerance, whose idea is to mitigate backup overhead by adaptively issuing backups, while ensuring that the errors upon failures are bounded with theoretical guarantees. Specifically, AF-Stream allows users to specify bounds on both the state divergence and the loss of non-backup streaming items. It issues state and item backups only when the bounds are reached. Our AF-Stream design provides an extensible programming model for incorporating general streaming algorithms as well as exports only few threshold parameters for configuring approximation fault tolerance. Furthermore, we formally prove that AF-Stream preserves high algorithm-specific accuracy of streaming algorithms, and in particular the convergence guarantees of online learning. Experiments show that AF-Stream maintains high performance (compared to no fault tolerance) and high accuracy after multiple failures (compared to no failures) under various streaming algorithms.
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期刊:
J. Mach. Learn. Res.
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