Flexile: meeting bandwidth objectives almost always
Flexile: meeting bandwidth objectives almost always
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灵活:几乎总能满足带宽目标
DOI:
10.1145/3555050.3569119
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Tawarmalani, Mohit
中科院分区:
文献类型:
--
作者:
Jiang, Chuan;Li, Zixuan;Rao, Sanjay;Tawarmalani, Mohit
Wide-area cloud provider networks must support the bandwidth requirements of network traffic despite failures. Existing traffic engineering (TE) schemes perform no better than an approach that optimally routes traffic for each failure scenario. We show that this results in sub-optimal routing decisions that hurt performance, and are potentially unfair to some traffic across scenarios. To tackle this, we developFlexile, which exploits and discovers opportunities to improve network performance by prioritizing certain traffic in each failure state so that it can meet its bandwidth requirements.Flexileseeks to minimize a desired percentile of loss across all traffic flows, while modeling diverse needs of different traffic classes. To achieve this,Flexileconsists of (i) an offline phase that identifies which failure states are critical for each flow; and (ii) an online phase, which on failure allocates bandwidth prioritizing critical flows for that failure state, while also judiciously allocating bandwidth to non-critical flows. For tractability,Flexile's offline phase uses a decomposition algorithm aided with problem-specific accelerations. Evaluations using real topologies, and validated with emulation testbed experiments, show thatFlexileoutperforms state-of-the-art TE schemes including SWAN, SMORE, and Teavar in reducing flow loss at desired percentiles by 46% or more in the median case.
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DOI:
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发表时间:
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期刊:
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影响因子:
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