VR2R-0265_r1

VR2R-0265

① SA Source

• Source: 開啟完整 SA 文章
• Section: Compute Tray Topology
• Line hint: 230

Context Before

Essentially, this means ConnectX-8 has two hosts, Grace CPU and B300 GPU. This improves latency in the backend network. However, for VR NVL72, the direct connection between Rubin GPU and ConnectX-9 is reverted back to the same design as GB200, as Rubin does not have PCIe bandwidth for two ConnectX-9.

Evidence

Rubin connects to Vera via C2C link, then Vera will connect to ConnectX-9 via PCIe6 lanes.

Context After

Secondly, the local NVMe storage for Rubin has been moved to a different location from that of NVMe storage in Grace Blackwell. Previously, local NVMe storage was managed by BlueField-3. For VR NVL72, the local NVMe storage is physically on the Orchid module managed by the ConnectX-9.

② Atomic Claim

Rubin 先透過 C2C link 連到 Vera，再由 Vera 透過 PCIe6 lanes 連到 ConnectX-9。

• Epistemic Mode: ASSERTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/Vera Rubin",
        "label": "Rubin"
      },
      "role": "accelerator"
    },
    {
      "node": {
        "id": "04_knowledge_base/ConnectX-9",
        "label": "ConnectX-9"
      },
      "role": "network_device"
    },
    {
      "node": {
        "id": "04_knowledge_base/PCIe",
        "label": "PCIe6"
      },
      "role": "host_interface"
    }
  ],
  "qualifiers": {
    "condition_text": "Vera and C2C are plain text in this source claim; not independently canonicalized here",
    "numeric_mentions": [
      "6"
    ],
    "temporal_mentions": []
  },
  "relation_type": "RUBIN_TO_CONNECTX9_VIA_VERA"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
accelerator	Rubin	04_knowledge_base/Vera Rubin
network_device	ConnectX-9	ConnectX-9
host_interface	PCIe6	PCIe

⑤ 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。