Article(id=1146098721139294448, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1146500022012580582, articleNumber=null, orderNo=21, doi=10.3981/j.issn.1000-7857.2024.08.01038, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1724169600000, receivedDateStr=2024-08-21, revisedDate=1735574400000, revisedDateStr=2024-12-31, acceptedDate=1744646400000, acceptedDateStr=2025-04-15, onlineDate=1751180828528, onlineDateStr=2025-06-29, pubDate=1747065600000, pubDateStr=2025-05-13, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1749744000000, onlineIssueDateStr=2025-06-13, onlineJustAcceptDate=1751285401742, onlineJustAcceptDateStr=2025-06-30, onlineFirstDate=1751180828528, onlineFirstDateStr=2025-06-29, sourceXml=null, magXml=null, createTime=1751180828528, creator=18627231156, updateTime=1774079670089, updator=sys-migrate, issue=Issue{id=1146500022012580582, tenantId=1146029695717560320, journalId=1146031591421210625, year='2025', volume='43', issue='9', pageStart='1', pageEnd='100', issueExtLink='null', onlineDate='null', pubDate='1747065600000', pubDateStr='2025-05-13', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1751276506188, creator='13701087609', updateTime=1774330384082, updator='13041195026', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1243194994346013325, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1146500022012580582, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243194994350207630, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1146500022012580582, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=62, endPage=75, ext={EN=ArticleExt(id=1146098722317893889, articleId=1146098721139294448, tenantId=1146029695717560320, journalId=1146031591421210625, language=EN, title=Research progress on technologies of high–performance network in artificial intelligence data center, columnId=1150494642224591153, journalTitle=Science & Technology Review, columnName=Exclusive, runingTitle=null, highlight=null, articleAbstract=
Amidst the rapid expansion of large−scale models and the AI sector, epitomized by advancements like ChatGPT, there is a burgeoning demand for intelligent computing power to facilitate extensive distributed computing applications. Traditional data centers are facing challenges to accommodate the performance requisites of these scenarios. Currently, the Chinese government has already issued numerous policies to expedite the development of artificial intelligence data centers, purveying clear policy guidance and accelerated planning and construction blueprints. A high−performance network is pivotal within AIDC, serving as the backbone for computational tasks and enabling inter−data center connectivity and efficient data transmission.This paper aims to establish a robust technical framework to propel the continuous development of high−performance network by primarily investigating key technologies for high−performance networks in artificial intelligence data center (AIDC). Core requirements in transport protocols, networking, and operation administration and maintenance (OAM) for large−scale AI tasks are studied. Based on these demands, this paper further investigate the evolving demands on different layers of Artificial Intelligence Network and delves into core technologies, e.g. network architecture, congestion control policy, load balance policy, operation administration and maintenance. Subsequently, from the two major perspectives of network protocol development and all−optical networks, this paper analyzes the future developmental trends of AIDC networks. To establish a robust high−performance network framework within AIDC, this paper concludes that sufficient network performance, such as a near−lossless network environment, adequate interconnectivity, and solutions to storage performance bottlenecks in distributed storage scenarios, must be purveyed effectively. Furthermore, the development of high−performance networks in AIDC necessitates the integration and synergy of key technologies, including standardized networking schemes, innovative load balancing and congestion control protocols, and advanced OAM mechanisms, to enhance operational efficiency. High−performance AIDC networks must also offer comprehensive and universal device and resource awareness, allocation, scheduling, and OAM across the entire network, providing high-performance lossless transmission capabilities.
, authors=null, authorsList=Jie REN, Chang LIU, Bowen HAN, Chenyang WEN, Bohua XU, Chang CAO, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=
All rights reserved. Unauthorized reproduction is prohibited., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1146098733869007522, articleId=1146098721139294448, tenantId=1146029695717560320, journalId=1146031591421210625, language=CN, title=智算中心高性能网络技术研究进展, columnId=1150494642375586098, journalTitle=科技导报, columnName=特色专题, runingTitle=null, highlight=null, articleAbstract=
随着ChatGPT引领的大模型与AI产业的爆发式发展,大规模分布式计算成为大模型训练常用模式,对应智算算力需求激增。旨在形成智算中心高性能网络技术体系,推动智算中心高性能网络技术持续发展。针对智算中心高性能网络内关键技术进行技术研究,首先,针对大规模智算业务承载场景,分析了智算中心提供高性能网络在传输协议层面、组网层面、管控运维层面的核心需求。随后依据所述需求,详细研究了智算中心高性能网络不同网络层的演进需求及智算中心高性能网络组网、面向智算中心网络的新型负载均衡协议与拥塞控制协议、新型网络管控及运维等领域的关键技术,对不同场景需求提供技术指导。其次,从网络协议发展与全光网络2个层面展开,分析了智算中心网络的未来导向与发展趋势。若要建立完善智算中心高性能网络技术体系,智算网络自身需提供足够的网络性能,如提供近似无丢包的网络环境、足够的互联能力并解决分布式存储场景下的存储性能瓶颈等;同时智算中心高性能网络的发展需要规范组网方案、高性能的新型负载均衡与拥塞控制协议、新型智慧化管控运维技术等方面关键技术的融合协同,提高运营效率;智算中心高性能网络需提供全局范围内设备与资源感知、分配、调度、运维的网络,并提供高性能无损传输能力。
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版权所有,未经授权,不得转载。, copyrightOwner=《科技导报》编辑部, extLink=null, articleAbsUrl=null, sourceXml=gE0tp13n9/Z+jSH+ZCZhYg==, magXml=gE0tp13n9/Z+jSH+ZCZhYg==, pdfUrl=null, pdf=hKrHjlcyyzK3UCTLmS8v6Q==, pdfFileSize=2518761, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=dralAKK9OlEDfjnaIUihyw==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=gP/AjFkgxHC2I90LGtgL3A==, mapNumber=null, fund=null)}, authors=[Author(id=1242143443745579039, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1146098721139294448, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=renj30@chinaunicom.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1242143443808493601, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1146098721139294448, authorId=1242143443745579039, language=EN, stringName=Jie REN, firstName=Jie, middleName=null, lastName=REN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=Research Institute of China United Network Communications Co., Ltd., Beijing 100176, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1242143443879796772, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1146098721139294448, authorId=1242143443745579039, language=CN, stringName=任杰, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=中国联合网络通信有限公司研究院, 北京 100176, bio={"content":"
任杰,工程师,研究方向为新型数据中心网络协议,电子信箱:renj30@chinaunicom.cn
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任杰,工程师,研究方向为新型数据中心网络协议,电子信箱:renj30@chinaunicom.cn
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| 技术 | 网络协议 | 实现 | 网卡 | 网络设备 | 开放性 | 优缺点 |
| Infiniband | IB | 将IB卸载到HCA上 | 仅Mellanox的IB卡 | 仅Mellanox的IB交换机 | IB专网 | 性能与稳定性均较好,但专网建设成本高、厂家单一、维护难度大且演进较慢 |
| RoCE | UDP/IP | 将RoCEv2卸载到NIC网卡上 | 支持RoCEv2的NIC网卡厂家较多:Mellanox、Broadcom、Qlogic、华为等 | 支持无损以太交换机 | 开放标准和网络架构 | 性能与IB相当,但要求以太网提供类似IB Link Layer的无损低延迟通路,对网络性能的要求较为严格 |
| iWARP | TCP/IP | 将TCP协议卸载到网卡上 | 仅Intel的iWARP卡 | 通用交换机 | 仅Intel | 由于TCP在高性能通信方面的弊端,其稳定性和性能损耗较大,尚未被广泛采用 |
), ArticleFig(id=1242143448548057187, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1146098721139294448, language=CN, label=表1, caption=
新型智算网络主流的承载方案对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 技术 | 网络协议 | 实现 | 网卡 | 网络设备 | 开放性 | 优缺点 |
| Infiniband | IB | 将IB卸载到HCA上 | 仅Mellanox的IB卡 | 仅Mellanox的IB交换机 | IB专网 | 性能与稳定性均较好,但专网建设成本高、厂家单一、维护难度大且演进较慢 |
| RoCE | UDP/IP | 将RoCEv2卸载到NIC网卡上 | 支持RoCEv2的NIC网卡厂家较多:Mellanox、Broadcom、Qlogic、华为等 | 支持无损以太交换机 | 开放标准和网络架构 | 性能与IB相当,但要求以太网提供类似IB Link Layer的无损低延迟通路,对网络性能的要求较为严格 |
| iWARP | TCP/IP | 将TCP协议卸载到网卡上 | 仅Intel的iWARP卡 | 通用交换机 | 仅Intel | 由于TCP在高性能通信方面的弊端,其稳定性和性能损耗较大,尚未被广泛采用 |
), ArticleFig(id=1242143448610971748, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1146098721139294448, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 网络类型 | 类型 | 网络流量特征 |
| 通用计算网络 | 传统数据中心 | 由多个小业务流汇聚而成的平稳数据流构成 |
| 存储前端网络 |
| 高性能存储后端网络 | 智算中心 | 以数量较多的高带宽大流为主,对时延高度敏感;由于缓存系统的存在,以写多读少的特征为主 |
| AI/ML大模型训练网络 | 由一定数量具有同步效应的大数据流组成的周期性峰值流量,流间具有明显的同步效应,对时延和抖动要求较高 |
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智算中心网络的差异性流量特征
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| 网络类型 | 类型 | 网络流量特征 |
| 通用计算网络 | 传统数据中心 | 由多个小业务流汇聚而成的平稳数据流构成 |
| 存储前端网络 |
| 高性能存储后端网络 | 智算中心 | 以数量较多的高带宽大流为主,对时延高度敏感;由于缓存系统的存在,以写多读少的特征为主 |
| AI/ML大模型训练网络 | 由一定数量具有同步效应的大数据流组成的周期性峰值流量,流间具有明显的同步效应,对时延和抖动要求较高 |
), ArticleFig(id=1242143448841658470, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1146098721139294448, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 方案 | 流量切分粒度 | 方案类型 | 是否需要修改网卡硬件 | 是否涉及重排序 | 是否需要TCP的流特性 | 是否多路径 | 是否需要SDN控制器 |
| CONGA | flowlet | 针对TCP | 否 | 否 | 是 | 否 | 否 |
| Presto | 包粒度 | 针对TCP | 是 | 是 | 否 | 是 | 否 |
| LetFlow | Flowlet | 针对TCP | 否 | 否 | 是 | 否 | 否 |
| Drill | 包粒度 | 针对TCP | 否 | 是 | 否 | 否 | 否 |
| PLB | 流/子流粒度 | 针对TCP | 是 | 是 | 是 | 否 | 否 |
| MP−RDMA | 包粒度 | 针对RDMA | 是 | 是 | 否 | 是 | 否 |
| Maestro | 子流粒度 | 针对RDMA | 否 | 否 | 否 | 是 | 是 |
| ConWeave | 流/子流粒度 | 针对RDMA | 否 | 是 | 否 | 否 | 否 |
), ArticleFig(id=1242143448908767335, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1146098721139294448, language=CN, label=表3, caption=
智算中心主流负载均衡方案及其特性对比
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| 方案 | 流量切分粒度 | 方案类型 | 是否需要修改网卡硬件 | 是否涉及重排序 | 是否需要TCP的流特性 | 是否多路径 | 是否需要SDN控制器 |
| CONGA | flowlet | 针对TCP | 否 | 否 | 是 | 否 | 否 |
| Presto | 包粒度 | 针对TCP | 是 | 是 | 否 | 是 | 否 |
| LetFlow | Flowlet | 针对TCP | 否 | 否 | 是 | 否 | 否 |
| Drill | 包粒度 | 针对TCP | 否 | 是 | 否 | 否 | 否 |
| PLB | 流/子流粒度 | 针对TCP | 是 | 是 | 是 | 否 | 否 |
| MP−RDMA | 包粒度 | 针对RDMA | 是 | 是 | 否 | 是 | 否 |
| Maestro | 子流粒度 | 针对RDMA | 否 | 否 | 否 | 是 | 是 |
| ConWeave | 流/子流粒度 | 针对RDMA | 否 | 是 | 否 | 否 | 否 |
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