VR2R-0269::SPLIT01
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Compute Tray Topology - Line hint:
379
Context Before
Source: Nvidia ↗, Nvidia VR NVL72 BoM and Power Budget Model ↗
Evidence
Lastly, the BlueField-4 DPU is able to control the 8 ConnectX-9 backend NICs allowing for unified management of both front end north-south network & back end high speed East-West networks. This system, known as Advanced Secure Trusted Resource Architecture (Astra), thus takes the provisioning and monitoring load off of the host CPU. The only issue with this is that BlueField-4 is expensive, so we expect most hyperscale customers to deploy their in-house DPU solutions instead. We will discuss customization more in the later sections.
Context After
Evolution from Blackwell
All of these modules in the VR NVL72 compute tray, while not exactly the same, are found in the compute tray of GB200/300. The only difference is the midplane module as it is a new component introduced to eliminate internal cables form the compute tray. Also, the modules at the front of the chassis (daughter modules) are much longer than their equivalent in Blackwell to connect the signal from the midplane to the front I/O ports via PCB. In the sections below we will discuss the cableless design, the changes in thermal design, and the changes in mechanical design in the compute tray.
② Atomic Claim
BlueField-4 DPU can control eight ConnectX-9 backend NICs.
- Epistemic Mode:
ASSERTED - Mapping Status:
COMPLETE
③ Semantic Frame
{
"attribute": "BACKEND_NIC_CONTROL",
"context_nodes": [
{
"id": "04_knowledge_base/DPU",
"label": "DPU"
},
{
"id": "04_knowledge_base/ConnectX-9",
"label": "ConnectX-9"
},
{
"id": "04_knowledge_base/NIC",
"label": "NICs"
}
],
"entity": {
"id": "04_knowledge_base/BlueField-4",
"label": "BlueField-4"
},
"frame_type": "ATTRIBUTE",
"qualifiers": {
"condition_text": null,
"numeric_mentions": [],
"temporal_mentions": []
},
"value": {
"numeric_mentions": [],
"value_text": "BlueField-4 DPU can control eight ConnectX-9 backend NICs."
}
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| entity | BlueField-4 | BlueField-4 |
| context_0 | DPU | DPU |
| context_1 | ConnectX-9 | ConnectX-9 |
| context_2 | NICs | NIC |
⑤ V2 Draft（需要修正時直接編輯）
Inline repair
只編輯以下三個 Draft 區塊。完成後將
review_action設為REQUEST_REPAIR，再手動執行 Repair Preview。
執行腳本前，Draft 不會寫入 Claim Store 或 Graph。
V2 Atomic Claim Draft
BlueField-4 DPU can control eight ConnectX-9 backend NICs.
V2 Semantic Frame Draft
{
"attribute": "BACKEND_NIC_CONTROL",
"context_nodes": [
{
"id": "04_knowledge_base/DPU",
"label": "DPU"
},
{
"id": "04_knowledge_base/ConnectX-9",
"label": "ConnectX-9"
},
{
"id": "04_knowledge_base/NIC",
"label": "NICs"
}
],
"entity": {
"id": "04_knowledge_base/BlueField-4",
"label": "BlueField-4"
},
"frame_type": "ATTRIBUTE",
"qualifiers": {
"condition_text": null,
"numeric_mentions": [],
"temporal_mentions": []
},
"value": {
"numeric_mentions": [],
"value_text": "BlueField-4 DPU can control eight ConnectX-9 backend NICs."
}
}V2 Revision Metadata Draft
{
"epistemic_mode": "ASSERTED",
"mapping_status": "COMPLETE"
}⑥ Human Review
請在 Properties 逐項確認：
- 原文 → Atomic Claim 是否忠實
- Atomic Claim → Semantic Frame 是否忠實
- Canonical Entity mapping 是否正確
- Epistemic mode 是否保留原文語氣
- 最後選擇
review_action
Review state
Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。