InfiniBand uye RDMA Networking
InfiniBand ndeyekumhanya-mhanya, yakaderera-latency yekubatanidza inobatanidza maseva uye maGPU mumasumbu eAI, uye RDMA inorega mumwe muchina uverenge kana kunyora ndangariro yemumwe usingabatanidzire CPU.
Pfupiso
Together they are the plumbing that keeps thousands of GPUs fed with data during large-model training.
Kudzika Kwakadzika
Paunodzidzisa modhi kuzviuru zveGPU, network inowanzova iyo bhodhoro, kwete machipi. InfiniBand ishanduko yejira chinangwa-yakagadzirirwa izvi: inopa per-link bandwidth mumazana egigabits pasekondi (NDR inomhanya pa400 Gb / s) uye microsecond-scale latency. Hunyengeri hwayo hwakakosha ndeye Remote Direct Memory Access (RDMA), iyo inofambisa data zvakananga pakati pendangariro dzenodhi mbiri, ichipfuura iyo inoshanda-system kernel uye CPU makopi anononoka akajairwa TCP/IP. Iyi 'kernel bypass' inosunungura CPU kutenderera uye inorova latency. InfiniBand inopawo hardware kuyerera kudzora kwejira risingarasikike, uye NVIDIA's Quantum switch pamwe neConnectX adapter inotonga AI supercomputers. RoCE (RDMA pamusoro peConverged Ethernet) inounza zvakafanana RDMA mabhenefiti kune Ethernet network.
Technical Insight
RDMA inoshanda kuburikidza nezviito uye mutsara pairi. Chikumbiro chinotumira zvikumbiro zvebasa kutumira uye kugamuchira mitsetse; iyo network adapta (iyo HCA) inovaverenga uye inoendesa data zvakananga munzvimbo dzakanyoreswa, dzakapinirwa ndangariro pane ari kure. Nekuti iyo NIC inobata kuchinjisa muhardware uye OS kernel inopfuudzwa, kune zero data makopi uye hapana per-packet CPU inovhiringidza kutamisa kwakawanda. InfiniBand's link-layer credit-based flow control inodzivirira buffer mafashama, ichiita kuti jira risarasikirwa pasina retransmission madutu.
Strategic Impact
Mutengo uye bhajeti
Zvisarudzo zvezvivakwa zvinotyaira kuita uye mutengo wekushandisa kwemakore.
Sarudzo dzakajeka
Dzidzo yehunyanzvi inobatsira zvikwata kusarudza murwi wakakodzera, kwete iwo mutsva chete.
Kudzora kwemhando yepamusoro
Sarudzo dzeinjiniya dziri nani dzinoderedza zviitiko zvekuvimbika mukugadzira.
Ramangwana reInfiniBand uye RDMA Networking
Bandwidth inoramba ichikwira: XDR InfiniBand yakananga 800 Gb/s per link, ine maroadmaps akananga 1.6 Tb/s. Makwikwi ari kuwedzera sezvo Ultra Ethernet Consortium inogadzira Ethernet inoenderana neInfiniBand yeAI yakawandisa, uye se-in-network computing (SHARP) inoburitsa masvomhu akabatana mumaswichi pachawo. Tarisira kubatanidzwa kweGPU-kune-netiweki kwakasimba, kusanganisirwa kwemaziso kucheka simba, uye machira akaiswa kumasumbu emazana ezviuru zveanomhanyisa sezvo mhando dzemuganhu dzichikura.
Real-World Implementation
Kubatanidza zviuru zveGPUs muAI supercomputer saka gradient data inofamba pakati pemanodhi mumamicroseconds panguva yakagoverwa kudzidziswa.
Kurega imwe sevha iverenge ndangariro yemumwe zvakananga (RDMA) kuti ikurumidze kugoverwa mafaira masisitimu uye dhatabhesi pasina CPU pamusoro.
Kumhanyisa NCCL zvese-kuderedza mashandiro pamusoro peInfiniBand kuwiriranisa maremu emhando paboka reGPU.
Uchishandisa RoCE kuunza RDMA-maitiro yakaderera-latency kutamisa kune iripo Ethernet data-center network
Njodzi & Guardrails
Kugadzirisa imwe bhenji kunogona kuvanza yakafara system kushaya simba.
Infrastructure uye mari yekugadzirisa inowanzotarisirwa pasi.
Chengetedzo uye kucherechedzwa mapundu anogona kukura sezvo masisitimu anowedzera kuoma.
Implementation Roadmap
Tsanangura latency, mhando, uye mutengo zvinangwa usati waitwa.
Benchmark pasi pechokwadi mutoro uye data mamiriro.
Chishandiso chekutarisa zvikanganiso, kudonha, uye mushandisi maitiro.
Gadzirira nzira dzekudzosera kumashure uye dzezviitiko usati wawedzera.
Ramba Uchiongorora
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Gaidhi rinotevera
Feature Injiniya Pipelines uye Data Versioning
Mibvunzo inowanzo bvunzwa
What is InfiniBand and RDMA Networking?
InfiniBand ndeyekumhanya-mhanya, yakaderera-latency yekubatanidza inobatanidza maseva uye maGPU mumasumbu eAI, uye RDMA inorega mumwe muchina uverenge kana kunyora ndangariro yemumwe usingabatanidzire CPU. Pamwe chete iwo mapombi anochengeta zviuru zveGPU zvakadyiswa nedata panguva yakakura-modhi yekudzidziswa.
Chii chinoita RDMA inobvumira komputa imwe chete kuita?
Remote Direct Memory Access inofambisa data yakatwasuka pakati pendangariro dzenodhi mbiri, ichipfuura neiyo OS kernel neCPU makopi, iyo inocheka latency uye inosunungura CPU kutenderera.
Nei InfiniBand ichiwana yakaderera latency pane yakajairwa TCP/IP networking?
InfiniBand adapters inotamisa data yakananga kune / kubva yakadhindwa ndangariro muhardware uye kupfuura iyo OS kernel, kubvisa per-packet CPU inovhiringidza uye data makopi.
Zvichida kuti ndeipi per-link bandwidth inopa NDR InfiniBand?
NDR (Next Data Rate) InfiniBand inomhanya pa400 Gb/s per link, neXDR yakananga 800 Gb/s muchizvarwa chinotevera.
MuRDMA, chii chinonzi 'queue pair' chinoshandiswa?
Zvikumbiro zvekutumira basa zvikumbiro zvekutumira uye kugamuchira mitsetse (mitsetse pairi); iyo host channel adapter inovaverenga uye inoita yakananga ndangariro kutamiswa.
Chii chinonzi RoCE?
RoCE inomiririra RDMA pamusoro peConverged Ethernet, ichibvumira yakaderera-latency, kernel-bypass kutamiswa pane akajairwa Ethernet machira pane yemuno InfiniBand.