Improving datacenter throughput and robustness with Lazy TCP over packet spraying

doi:10.1016/j.comcom.2015.02.011

CORC > 计算技术研究所 > 中国科学院计算技术研究所 > 中国科学院计算技术研究所期刊论文 > 英文

	Improving datacenter throughput and robustness with Lazy TCP over packet spraying
	Zhang, Jie 2; Zhang, Dafang 2; Huang, Kun 1
刊名	COMPUTER COMMUNICATIONS
	2015-05-15
卷号	62 页码:23-33
关键词	Datacenter network TCP Packet spraying Packet reordering Link degradation
ISSN号	0140-3664
DOI	10.1016/j.comcom.2015.02.011
英文摘要	Packet spraying is being recognized as a promising multipath routing approach in datacenter for full utilization of multiple paths. However, existing TCP schemes face serious challenge of robustness when running over packet spraying. They suffer severely from frequent packet reordering and link degradation, resulting in low throughput. To address these issues, this paper proposes Lazy TCP (LTCP), a novel TCP over packet spraying to provide robustness and achieve high throughput. Our basic idea is that TCP should not backoff quickly when receiving congestion signals, as these signals can be easily caused by non-congestion events in packet spraying circumstance. LTCP performs congestion avoidance in a lazy way. First, to mitigate the impact of packet reordering, LTCP delays the time to perform congestion avoidance. As the sender waits more time for the disordered packet, LTCP avoids unnecessary backoff caused by packet reordering. Second, to eliminate the impact of link degradation, LTCP stubbornly maintains data transmission rate. When performing congestion avoidance, LTCP never halves data transmission rate unless identifying successive packet loss. Such design is based on our key observation that degraded link stands a good chance of causing discrete packet loss in a batch of packets. And it effectively eliminates the impact of link degradation. Simulations on NS2 show that LTCP is robust and high-throughput, and improves 2.4 times throughput compared to existing TCP in cases of packet reordering and link degradation. (C) 2015 Elsevier B.V. All rights reserved.
资助项目	National Basic Research Program of China (973)[2012CB315805] ; National Science Foundation of China[61173167] ; National Science Foundation of China[61472130] ; National Science Foundation of China[61100171] ; Prospective Research Project on Future Networks of Jiangsu Future Networks Innovation Institute[BY2013095-1-05]
WOS研究方向	Computer Science ; Engineering ; Telecommunications
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000355046000003
内容类型	期刊论文
源URL	[http://119.78.100.204/handle/2XEOYT63/9694]
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Zhang, Dafang
作者单位	1.Chinese Acad Sci, Inst Comp Technol, Beijing, Peoples R China 2.Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jie,Zhang, Dafang,Huang, Kun. Improving datacenter throughput and robustness with Lazy TCP over packet spraying[J]. COMPUTER COMMUNICATIONS,2015,62:23-33.
APA	Zhang, Jie,Zhang, Dafang,&Huang, Kun.(2015).Improving datacenter throughput and robustness with Lazy TCP over packet spraying.COMPUTER COMMUNICATIONS,62,23-33.
MLA	Zhang, Jie,et al."Improving datacenter throughput and robustness with Lazy TCP over packet spraying".COMPUTER COMMUNICATIONS 62(2015):23-33.