Dart: Divide and Specialize for Fast Response to Congestion in RDMA-based Datacenter Networks Article Swipe

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Jaichen Xue , Muhammad Usama Chaudhry , Balajee Vamanan , T. N. Vijaykumar , Mithuna Thottethodi ·

YOU? · · 2018 · Open Access · · DOI: https://doi.org/10.48550/arxiv.1805.11158

Though Remote Direct Memory Access (RDMA) promises to reduce datacenter network latencies significantly compared to TCP (e.g., 10x), end-to-end congestion control in the presence of incasts is a challenge. Targeting the full generality of the congestion problem, previous schemes rely on slow, iterative convergence to the appropriate sending rates (e.g., TIMELY takes 50 RTTs). Several papers have shown that even in oversubscribed datacenter networks most congestion occurs at the receiver. Accordingly, we propose a divide-and-specialize approach, called Dart, which isolates the common case of receiver congestion and further subdivides the remaining in-network congestion into the simpler spatially-localized and the harder spatially-dispersed cases. For receiver congestion, we propose direct apportioning of sending rates (DASR) in which a receiver for n senders directs each sender to cut its rate by a factor of n, converging in only one RTT. For the spatially-localized case, Dart provides fast (under one RTT) response by adding novel switch hardware for in-order flow deflection (IOFD) because RDMA disallows packet reordering on which previous load balancing schemes rely. For the uncommon spatially-dispersed case, Dart falls back to DCQCN. Small-scale testbed measurements and at-scale simulations, respectively, show that Dart achieves 60% (2.5x) and 79% (4.8x) lower 99th-percentile latency, and similar and 58% higher throughput than InfiniBand, and TIMELY and DCQCN.

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Remote direct memory access InfiniBand Computer science Network congestion Computer network Testbed Network packet Latency (audio) Dart Queueing theory Throughput Operating system Telecommunications Wireless Programming language

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/1805.11158
PDF: https://arxiv.org/pdf/1805.11158
OA Status: green
Cited By: 2
References: 52
Related Works: 10
OpenAlex ID: https://openalex.org/W2807221803

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DOI: https://doi.org/10.48550/arxiv.1805.11158

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Title: Dart: Divide and Specialize for Fast Response to Congestion in RDMA-based Datacenter Networks

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Type: preprint

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Language: en

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Publication year: 2018

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Publication date: 2018-05-28

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Authors: Jaichen Xue, Muhammad Usama Chaudhry, Balajee Vamanan, T. N. Vijaykumar, Mithuna Thottethodi

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Landing page: https://arxiv.org/abs/1805.11158

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PDF URL: https://arxiv.org/pdf/1805.11158

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Concepts: Remote direct memory access, InfiniBand, Computer science, Network congestion, Computer network, Testbed, Network packet, Latency (audio), Dart, Queueing theory, Throughput, Operating system, Telecommunications, Wireless, Programming language

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Cited by: 2

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referenced_works_count	52
abstract_inverted_index.a	27, 73, 115, 128
abstract_inverted_index.n	118
abstract_inverted_index.50	52
abstract_inverted_index.at	67
abstract_inverted_index.by	127, 148
abstract_inverted_index.in	21, 60, 113, 133
abstract_inverted_index.is	26
abstract_inverted_index.n,	131
abstract_inverted_index.of	24, 33, 83, 109, 130
abstract_inverted_index.on	40, 163
abstract_inverted_index.to	7, 14, 44, 123, 178
abstract_inverted_index.we	71, 105
abstract_inverted_index.58%	202
abstract_inverted_index.60%	191
abstract_inverted_index.79%	194
abstract_inverted_index.For	102, 137, 170
abstract_inverted_index.TCP	15
abstract_inverted_index.and	86, 97, 183, 193, 199, 201, 207, 209
abstract_inverted_index.cut	124
abstract_inverted_index.for	117, 153
abstract_inverted_index.its	125
abstract_inverted_index.one	135, 145
abstract_inverted_index.the	22, 30, 34, 45, 68, 80, 89, 94, 98, 138, 171
abstract_inverted_index.Dart	141, 175, 189
abstract_inverted_index.RDMA	159
abstract_inverted_index.RTT)	146
abstract_inverted_index.RTT.	136
abstract_inverted_index.back	177
abstract_inverted_index.case	82
abstract_inverted_index.each	121
abstract_inverted_index.even	59
abstract_inverted_index.fast	143
abstract_inverted_index.flow	155
abstract_inverted_index.full	31
abstract_inverted_index.have	56
abstract_inverted_index.into	93
abstract_inverted_index.load	166
abstract_inverted_index.most	64
abstract_inverted_index.only	134
abstract_inverted_index.rate	126
abstract_inverted_index.rely	39
abstract_inverted_index.show	187
abstract_inverted_index.than	205
abstract_inverted_index.that	58, 188
abstract_inverted_index.10x),	17
abstract_inverted_index.Dart,	77
abstract_inverted_index.case,	140, 174
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abstract_inverted_index.lower	196
abstract_inverted_index.novel	150
abstract_inverted_index.rates	48, 111
abstract_inverted_index.rely.	169
abstract_inverted_index.shown	57
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abstract_inverted_index.takes	51
abstract_inverted_index.which	78, 114, 164
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abstract_inverted_index.(4.8x)	195
abstract_inverted_index.(DASR)	112
abstract_inverted_index.(IOFD)	157
abstract_inverted_index.(RDMA)	5
abstract_inverted_index.(e.g.,	16, 49
abstract_inverted_index.(under	144
abstract_inverted_index.Access	4
abstract_inverted_index.DCQCN.	179, 210
abstract_inverted_index.Direct	2
abstract_inverted_index.Memory	3
abstract_inverted_index.RTTs).	53
abstract_inverted_index.Remote	1
abstract_inverted_index.TIMELY	50, 208
abstract_inverted_index.Though	0
abstract_inverted_index.adding	149
abstract_inverted_index.called	76
abstract_inverted_index.cases.	101
abstract_inverted_index.common	81
abstract_inverted_index.direct	107
abstract_inverted_index.factor	129
abstract_inverted_index.harder	99
abstract_inverted_index.higher	203
abstract_inverted_index.occurs	66
abstract_inverted_index.packet	161
abstract_inverted_index.papers	55
abstract_inverted_index.reduce	8
abstract_inverted_index.sender	122
abstract_inverted_index.switch	151
abstract_inverted_index.Several	54
abstract_inverted_index.because	158
abstract_inverted_index.control	20
abstract_inverted_index.directs	120
abstract_inverted_index.further	87
abstract_inverted_index.incasts	25
abstract_inverted_index.network	10
abstract_inverted_index.propose	72, 106
abstract_inverted_index.schemes	38, 168
abstract_inverted_index.senders	119
abstract_inverted_index.sending	47, 110
abstract_inverted_index.similar	200
abstract_inverted_index.simpler	95
abstract_inverted_index.testbed	181
abstract_inverted_index.achieves	190
abstract_inverted_index.at-scale	184
abstract_inverted_index.compared	13
abstract_inverted_index.hardware	152
abstract_inverted_index.in-order	154
abstract_inverted_index.isolates	79
abstract_inverted_index.latency,	198
abstract_inverted_index.networks	63
abstract_inverted_index.presence	23
abstract_inverted_index.previous	37, 165
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abstract_inverted_index.provides	142
abstract_inverted_index.receiver	84, 103, 116
abstract_inverted_index.response	147
abstract_inverted_index.uncommon	172
abstract_inverted_index.Targeting	29
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abstract_inverted_index.balancing	167
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abstract_inverted_index.iterative	42
abstract_inverted_index.latencies	11
abstract_inverted_index.receiver.	69
abstract_inverted_index.remaining	90
abstract_inverted_index.challenge.	28
abstract_inverted_index.congestion	19, 35, 65, 85, 92
abstract_inverted_index.converging	132
abstract_inverted_index.datacenter	9, 62
abstract_inverted_index.deflection	156
abstract_inverted_index.end-to-end	18
abstract_inverted_index.generality	32
abstract_inverted_index.in-network	91
abstract_inverted_index.reordering	162
abstract_inverted_index.subdivides	88
abstract_inverted_index.throughput	204
abstract_inverted_index.InfiniBand,	206
abstract_inverted_index.Small-scale	180
abstract_inverted_index.appropriate	46
abstract_inverted_index.congestion,	104
abstract_inverted_index.convergence	43
abstract_inverted_index.Accordingly,	70
abstract_inverted_index.apportioning	108
abstract_inverted_index.measurements	182
abstract_inverted_index.simulations,	185
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abstract_inverted_index.significantly	12
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abstract_inverted_index.99th-percentile	197
abstract_inverted_index.spatially-dispersed	100, 173
abstract_inverted_index.spatially-localized	96, 139
abstract_inverted_index.divide-and-specialize	74
cited_by_percentile_year
countries_distinct_count	1
institutions_distinct_count	5
citation_normalized_percentile