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基于SDN網(wǎng)絡(luò )大象流負載均衡算法研究
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中國電子科技集團公司第五十四研究所

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Research on Elephant Flow Load balancing Algorithm Based on SDN

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    摘要:

    摘 要:負載均衡算法是通過(guò)對網(wǎng)絡(luò )中的流量進(jìn)行調度來(lái)提高網(wǎng)絡(luò )資源利用率,是計算機網(wǎng)絡(luò )中的一個(gè)重要研究方向;針對網(wǎng)絡(luò )中大象流導致的網(wǎng)絡(luò )擁塞和老鼠流的排隊時(shí)延等負載不均衡問(wèn)題,提出了帶寬和時(shí)延加權負載均衡(BD-WLB)算法來(lái)提高負載均衡性能,綜合考慮了大小流之間的流量特征不同,改進(jìn)了傳統算法的路徑計算方式;算法通過(guò)控制器來(lái)獲取網(wǎng)絡(luò )流量和狀態(tài)信息;然后利用帶寬和時(shí)延等網(wǎng)絡(luò )狀態(tài)參數來(lái)為大象流和老鼠流分別計算最優(yōu)路徑;采用P4語(yǔ)言來(lái)對數據平面轉發(fā)流程進(jìn)行優(yōu)化處理;實(shí)驗結果表明,在高負載狀態(tài)時(shí),BD-WLB算法相比于ECMP算法提高了38.4%的網(wǎng)絡(luò )吞吐量和41.9%的鏈路利用率,降低了41.8%的網(wǎng)絡(luò )時(shí)延;使網(wǎng)絡(luò )資源得到了更好的利用,證明了BD-WLB算法的可行性和有效性;

    Abstract:

    Load balancing algorithm is an important research direction in computer network, which can improve the utilization of network resources by scheduling the traffic in the network. In order to solve the load imbalance problems such as network congestion caused by elephant flow and queue delay of rat flow in the network, the bandwidth and delay weighted load balancing (BD-WLB) algorithm is proposed to improve the load balancing performance. The path calculation method of the traditional algorithm is improved by considering the different traffic characteristics between small and large streams. The algorithm obtains network traffic and state information through the controller. Then the optimal path is calculated for elephant flow and mouse flow respectively by using network state parameters such as bandwidth and delay. P4 language is used to optimize the data plane forwarding process. The experimental results show that the BD-WLB algorithm improves the network throughput by 38.4%, the link utilization by 41.9% and the network delay by 41.8% compared with the ECMP algorithm at high load. It makes better use of network resources and proves the feasibility and effectiveness of BD-WLB algorithm.

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張一凡,韓衛占.基于SDN網(wǎng)絡(luò )大象流負載均衡算法研究計算機測量與控制[J].,2023,31(1):257-263.

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歷史
  • 收稿日期:2022-11-12
  • 最后修改日期:2022-11-17
  • 錄用日期:2022-11-17
  • 在線(xiàn)發(fā)布日期: 2023-01-16
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