On the coexistence of transport protocols in data centers

Irteza, Syed Mohammad; Ahmed, Azeemuddin; Farrukh, Sana; Memon, Babar Naveed; Qazi, Ihsan Ayyub

doi:10.1109/icc.2014.6883814

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…The analysis of widely used TCP variants in static DCNs is presented in [36]. The performance analysis of coexisting DCTCP and other TCP variants are investigated in [14]. Improvements to DCTCP and an overview of existing CC implementations are discussed in [40].…”

Section: Related Workmentioning

confidence: 99%

“…Previous studies have shown that many TCP variants coexist alongside each other [9], [14]. The goal of comparing two different TCP variants is to shed light on the scenarios involving the interaction of different TCP variants.…”

Section: Competition Of Two Flows: Different Tcp Variantsmentioning

confidence: 99%

“…low-latency or high throughput, for them may differ from one another. To meet the performance goals, tenants may prefer different CC algorithms that lead to a shared network of different applications and interference of various CC algorithms [14]- [16]. The changing nature of such DCNs means that a mix of transport layer protocols and their variants can coexist [17], [18].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

When TCP Meets Reconfigurations: A Comprehensive Measurement Study

Aykurt,

Zerwas,

Blenk

et al. 2024

IEEE Trans. Netw. Serv. Manage.

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The diversity of deployed applications in data centers leads to a complex traffic mix in the network. Reconfigurable Data Center Networks (RDCNs) have been designed to fulfill the demanding requirements of ever-changing data center traffic. However, they pose new challenges for network traffic engineering, e.g., interference between reconfigurations, transport layer protocols, and congestion control (CC) algorithms. This raises a fundamental research problem: can the current transport layer protocols handle frequent network updates?This paper focuses on TCP and presents a measurement study of TCP performance in RDCNs. In particular, it evaluates diverse traffic mixes combining TCP variants, UDP, and QUIC transport protocols. The quantitative analysis of the measurements shows that migrated TCP flows suffer from frequent reconfigurations. The effect of reconfigurations on the cost, e.g. increased Flow Completion Time (FCT), depending on the traffic mix is modeled with Machine Learning (ML) methods. The availability of such a model will provide insights into the relationship between the reconfiguration settings and the FCT. Our model explains 88% of the variance in the FCT increase under different reconfiguration settings.

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Section: Related Workmentioning

confidence: 99%

Section: Competition Of Two Flows: Different Tcp Variantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

When TCP Meets Reconfigurations: A Comprehensive Measurement Study

Aykurt,

Zerwas,

Blenk

et al. 2024

IEEE Trans. Netw. Serv. Manage.

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show abstract

“…Several works have found, via measurements and analysis, that TCP timeouts are the root cause of most throughput and latency problems in data-center networks [1,5,37,39,41,42,55,59]. Other works [6,22,23,30,32,38,40,53,58,[63][64][65] analyzed the nature of incast events and packet drops in data-centers 4 ,. They also found that severe incast occurrences could lead to throughput collapse and longer FCT.…”

Section: Related Workmentioning

confidence: 99%

T-RACKs: A Faster Recovery Mechanism for TCP in Data Center Networks

Abdelmoniem

Bensaou

2021

IEEE/ACM Trans. Networking

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Cloud interactive data-driven applications generate swarms of small TCP flows that compete for the small buffer space in data-center switches. Such applications require a short flow completion time (FCT) to perform their jobs effectively. However, TCP is oblivious to the composite nature of application data and artificially inflates the FCT of such flows by several orders of magnitude. This is due to TCP's Internet-centric design that fixes the retransmission timeout (RTO) to be at least hundreds of milliseconds. To better understand this problem, in this paper, we use empirical measurements in a small testbed to study, at a microscopic level, the effects of various types of packet losses on TCP's performance. In particular, we single out packet losses that impact the tail end of small flows, as well as bursty losses, that span a significant fraction of the small congestion window of TCP flows in data-centers, to show a non-negligible effect on the FCT. Based on this, we propose the so-called, timely-retransmitted ACKs (or T-RACKs), a simple loss recovery mechanism to conceal the drawbacks of the long RTO even in the presence of heavy packet losses. Interestingly enough, T-RACKS achieves this transparently to TCP itself as it does not require any change to TCP in the tenant's virtual machine (VM). T-RACKs can be implemented as a software shim layer in the hypervisor between the VMs and server's NIC or in hardware as a networking function in a SmartNIC. Simulation and real testbed results show that T-RACKs achieves remarkable performance improvements.

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“…The networking community has analyzed TCP behavior in static environments [10]- [13]. However, in heterogeneous cloud environments, newly introduced versions of TCP as well as different transport layer protocols coexist [14]. Available studies for TCP performance in dynamic environments are also limited and lack the interaction of multiple flows [9].…”

Section: Introductionmentioning

confidence: 99%

On the Performance of TCP in Reconfigurable Data Center Networks

Aykurt

Zerwas

Blenk

et al. 2022

2022 18th International Conference on Network and Service Management (CNSM)

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Today's data centers are hosting various applications under the same roof. The diversity among deployed applications leads to a complex traffic mix in Data Center Networks (DCNs). Reconfigurable Data Center Networks (RD-CNs) have been designed to fulfill the demanding requirements of ever-changing data center traffic. However, they pose new challenges for network traffic engineering, e.g., interference between reconfigurations and congestion control (CC). This raises a fundamental research problem: can the current transport layer protocols handle frequent network updates?This paper focuses on the Transmission Control Protocol (TCP) and presents a measurement study of TCP variants in RDCNs. The quantitative analysis of the measurements shows that migrated flows suffer from frequent reconfigurations. The effect of reconfigurations on the cost, e.g. increased Flow Completion Time (FCT), depending on the traffic mix is modeled with Machine Learning (ML) methods. The availability of such a model will provide insights into the relationship between the reconfiguration settings and the FCT. Our model explains 88% of the variance in the FCT increase under different reconfiguration settings.

show abstract

On the coexistence of transport protocols in data centers

Cited by 9 publications

References 13 publications

When TCP Meets Reconfigurations: A Comprehensive Measurement Study

When TCP Meets Reconfigurations: A Comprehensive Measurement Study

T-RACKs: A Faster Recovery Mechanism for TCP in Data Center Networks

On the Performance of TCP in Reconfigurable Data Center Networks

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