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Time-dependent load-balancing service degradation in optical data center networks

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Abstract

Optical data center networks (ODCNs) are constructed by connecting geographically distributed data centers with optical networks. Due to the superiorities in computing and transmission performances, ODCNs have been widely acknowledged as a promising network paradigm to support the popular enterprise IT applications such as cloud computing and 3D rendering. However, the ever-increasing traffic burst and the expensive hardware upgrading impose more severe challenges on the design of resource allocation scheme in ODCNs, which is urgently required to take into account not only the service quality but also the economical profit of service provider. In this paper, we focus on the service degradation in ODCNs which has been proven efficient in reducing the denied requests in the overloaded network scenario by releasing portion of the occupied network resources with the acceptable service quality loss. Unlike the service degradation scheme in previous works, we first consider the impact of the time characteristics of service requests on the resource utilization and propose a novel time-dependent load-balancing service degradation (TD-LBSD) framework. In the TD-LBSD framework, a time-dependent link weight scheme is invented for the allocation of bandwidth resource to avoid the potential traffic congestion that is usually induced by the ignored dynamic nature of service requests. In order to support the high-level prepaid requests with unknown holding time, we also propose a statistical method to estimate the residual time of the occupied lightpaths based on the probability distribution of the holding time of past requests. Simulation results verified that our proposed service degradation framework outperforms the previous schemes with the profit gain of 6.2% and the reduced traffic congestions of 16.39% at best.

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Notes

  1. When a request arrives with its own original holding time, if this request does not leave, its residual time means the holding time minus the passed time. Thus, the residual time is always less than or equal to the holding time.

  2. For all requests on the lightpath, the maximal residual time among them is defined as the residual time of the lightpath.

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Acknowledgements

This work was partly supported by National Natural Science Foundation of China (Nos. 61471109 and 61501104) and Fundamental Research Funds for the Central Universities (Nos. N150406001, N150401002 and N161608001).

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Authors and Affiliations

  1. School of Computer Science and Engineering, Northeastern University, Shenyang, 110819, China

    Yue Zong, Cunqian Yu, Yejun Liu, Qihan Zhang, Yuyang Sun & Lei Guo

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  1. Yue Zong
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  2. Cunqian Yu
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  3. Yejun Liu
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  4. Qihan Zhang
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  5. Yuyang Sun
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  6. Lei Guo
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Correspondence to Yejun Liu.

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Zong, Y., Yu, C., Liu, Y. et al. Time-dependent load-balancing service degradation in optical data center networks. Photon Netw Commun 34, 411–421 (2017). https://doi.org/10.1007/s11107-017-0710-3

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  • DOI: https://doi.org/10.1007/s11107-017-0710-3

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