{"schema_version":"onlylabs.public_signal.v1","title":"Nebius Repo: nebius/nccl-topology","description":"Nebius repo signal with public source context, captured evidence pages, related signals, and category-scoped analysis context.","url":"https://onlylabs.fyi/signals/2dc68bf2-d2e9-45b3-88a5-789549fce820","json_url":"https://onlylabs.fyi/signals/2dc68bf2-d2e9-45b3-88a5-789549fce820/signal.json","generated_at":"2026-06-11T04:10:11.074013+00:00","org":{"slug":"nebius","name":"Nebius","category":"neocloud","category_label":"Neocloud","dossier_url":"https://onlylabs.fyi/labs/nebius","dossier_json_url":"https://onlylabs.fyi/labs/nebius/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/2dc68bf2-d2e9-45b3-88a5-789549fce820","signal_json":"https://onlylabs.fyi/signals/2dc68bf2-d2e9-45b3-88a5-789549fce820/signal.json","source":"https://github.com/nebius/nccl-topology","lab_dossier":"https://onlylabs.fyi/labs/nebius","lab_dossier_json":"https://onlylabs.fyi/labs/nebius/dossier.json","analysis":"https://onlylabs.fyi/analysis/nebius","analysis_json":"https://onlylabs.fyi/analysis/nebius/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/nebius/evidence.json","category":"https://onlylabs.fyi/neoclouds","category_json":"https://onlylabs.fyi/neoclouds.json","category_feed":"https://onlylabs.fyi/neoclouds/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json?category=neocloud","topic":null,"topic_signals_json":null,"topic_feed":null,"data_business":null},"answer_pack":{"answer":"Nebius published nebius/nccl-topology. This repository signal exposes tooling, eval, infrastructure, or model-adjacent work before it may appear in a launch post. High-signal details: repo nebius/nccl-topology · nebius/nccl-topology Stars: 4 Forks: 0 Open issues: 0 Created: 2024-01-16T13:38:52Z Pushed: 2024-01-30T16:10:50Z Default branch: main Fork: no Archived: no README:.... onlylabs links this event to 1 captured evidence page and 6 related repo signals.","signal_desk":"repos","source_context":{"source_url":"https://github.com/nebius/nccl-topology","source_host":"github.com","occurred_at":"2024-01-16T13:38:52+00:00","first_seen_at":"2026-06-05T22:32:09.881762+00:00","date_source":"source","context":null},"context_markers":[{"label":"Lab","value":"Nebius","source":"signal"},{"label":"Signal desk","value":"repos","source":"signal"},{"label":"Source host","value":"github.com","source":"source"},{"label":"Repository","value":"nebius/nccl-topology","source":"source"},{"label":"Stars","value":"4","source":"traction"},{"label":"Watch term","value":"Infrastructure","source":"evidence"}],"evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://github.com/nebius/nccl-topology"],"related_signals":6,"has_source_url":true,"latest_page_fetched_at":"2026-06-11T04:10:11.074013+00:00"},"data_business":{"matches":false,"lanes":[],"matched_terms":[],"score":null,"reason":null},"agent_handoff":{"signal_json":"https://onlylabs.fyi/signals/2dc68bf2-d2e9-45b3-88a5-789549fce820/signal.json","dossier_json":"https://onlylabs.fyi/labs/nebius/dossier.json","analysis_json":"https://onlylabs.fyi/analysis/nebius/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/nebius/evidence.json","topic_signals_json":null,"topic_feed":null,"category_signals_json":"https://onlylabs.fyi/signals.json?category=neocloud","data_radar_json":null,"opportunities_json":null},"analysis_playbook":{"objective":"Turn new repository signals into early evidence of tooling, eval, infrastructure, model-adjacent, or product work before it appears in polished launch channels.","evidence_focus":["repo name","owner","description","language","stars","source URL","first seen time","data, eval, infra, safety, and product terms"],"extraction_questions":["What technical area does this repository expose?","Does the repo imply eval, data, infrastructure, agent, or deployment work?","Is the repo new evidence for a lab direction that is not yet in writing or releases?","Which related signals should an analyst inspect next?"],"signal_questions":["What does this new repository reveal before a formal announcement exists?","What technical area does this repository expose?","Does the repo imply eval, data, infrastructure, agent, or deployment work?","Do the 6 related repo signals show a repeated pattern?"],"output_fields":["org","repo","technical_theme","evidence_url"],"data_business_relevance":"Data-business lane extraction is scoped to frontier labs; 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This repository signal exposes tooling, eval, infrastructure, or model-adjacent work before it may appear in a launch post. High-signal details: repo nebius/nccl-topology · nebius/nccl-topology Stars: 4 Forks: 0 Open issues: 0 Created: 2024-01-16T13:38:52Z Pushed: 2024-01-30T16:10:50Z Default branch: main Fork: no Archived: no README:.... onlylabs links this event to 1 captured evidence page and 6 related repo signals.","semantic_triples":[{"subject":"Nebius","predicate":"published repo","object":"nebius/nccl-topology","text":"Nebius published repo nebius/nccl-topology."},{"subject":"nebius/nccl-topology","predicate":"is classified as","object":"repo signal","text":"nebius/nccl-topology is classified as repo signal."},{"subject":"nebius/nccl-topology","predicate":"belongs to","object":"repos desk","text":"nebius/nccl-topology belongs to repos desk."},{"subject":"nebius/nccl-topology","predicate":"has evidence coverage","object":"1 captured evidence page","text":"nebius/nccl-topology has evidence coverage 1 captured evidence page."}]},"signal":{"id":"2dc68bf2-d2e9-45b3-88a5-789549fce820","url":"https://onlylabs.fyi/signals/2dc68bf2-d2e9-45b3-88a5-789549fce820","json_url":"https://onlylabs.fyi/signals/2dc68bf2-d2e9-45b3-88a5-789549fce820/signal.json","source_url":"https://github.com/nebius/nccl-topology","title":"nebius/nccl-topology","summary":"Nebius published a new repository. onlylabs watches repos for tooling, eval, infra, and model-adjacent work.","context":null,"kind":{"key":"repo_new","label":"Repo"},"org":{"slug":"nebius","name":"Nebius","category":"neocloud"},"occurred_at":"2024-01-16T13:38:52+00:00","first_seen_at":"2026-06-05T22:32:09.881762+00:00","date_source":"source","evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://github.com/nebius/nccl-topology"]},"facets":{"repo":"nebius/nccl-topology"},"traction":{"github_stars":4,"hn_points":null,"hn_comments":null,"hn_story_id":null,"hf_downloads":null,"hf_likes":null},"data_radar":null},"primary_evidence_page":{"url":"https://github.com/nebius/nccl-topology","final_url":"https://github.com/nebius/nccl-topology","title":"nebius/nccl-topology repository metadata","http_status":200,"content_type":"application/json","capture_method":"plain","fetched_at":"2026-06-11T04:10:11.074013+00:00","bytes":8199,"raw_path":"0ade633441ee7f56c2e3bd9e025b3abd6fa811c74c14a57d16477a9a81688d27.json","content_hash":"98788dfee5f973cab26de7f42657897d12a1083437c48403371ede1a717f6586","excerpt_chars":1200,"truncated":false,"excerpt":"nebius/nccl-topology Stars: 4 Forks: 0 Open issues: 0 Created: 2024-01-16T13:38:52Z Pushed: 2024-01-30T16:10:50Z Default branch: main Fork: no Archived: no README: Topology file for Nebius AI GPU clusters For Nebius AI virtual machines in [GPU clusters](https://nebius.ai/docs/compute/concepts/gpu-clusters), the PCI device topology differs from the default bare-metal one. This file describes how Nebius AI hardware and InfiniBand network are designed from the VM perspective. After applying it, all workloads that are using NCCL in multi-host environment will be more stable and have better performance results. To run stable NCCL tests and improve workloads performance, apply Nebius AI topology on your VMs or inside containers you run on the VMs: 1. Download `nccl-topo-h100-v1.xml`. 1. Set the path to the downloaded file via the `NCCL_TOPO_FILE` environment variable. For example: ``` export NCCL_TOPO_FILE=/opt/nebius/nccl-topo-h100-v1.xml ``` For more information about testing GPU clusters in Nebius AI, see the [documentation](https://nebius.ai/docs/compute/operations/#gpu-test)."},"evidence_pages":[{"url":"https://github.com/nebius/nccl-topology","final_url":"https://github.com/nebius/nccl-topology","title":"nebius/nccl-topology repository metadata","http_status":200,"content_type":"application/json","capture_method":"plain","fetched_at":"2026-06-11T04:10:11.074013+00:00","bytes":8199,"raw_path":"0ade633441ee7f56c2e3bd9e025b3abd6fa811c74c14a57d16477a9a81688d27.json","content_hash":"98788dfee5f973cab26de7f42657897d12a1083437c48403371ede1a717f6586","excerpt_chars":1200,"truncated":false,"excerpt":"nebius/nccl-topology Stars: 4 Forks: 0 Open issues: 0 Created: 2024-01-16T13:38:52Z Pushed: 2024-01-30T16:10:50Z Default branch: main Fork: no Archived: no README: Topology file for Nebius AI GPU clusters For Nebius AI virtual machines in [GPU clusters](https://nebius.ai/docs/compute/concepts/gpu-clusters), the PCI device topology differs from the default bare-metal one. This file describes how Nebius AI hardware and InfiniBand network are designed from the VM perspective. After applying it, all workloads that are using NCCL in multi-host environment will be more stable and have better performance results. To run stable NCCL tests and improve workloads performance, apply Nebius AI topology on your VMs or inside containers you run on the VMs: 1. Download `nccl-topo-h100-v1.xml`. 1. Set the path to the downloaded file via the `NCCL_TOPO_FILE` environment variable. 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