VR2R-0512_r1

VR2R-0512

① SA Source

• Source: 開啟完整 SA 文章
• Section: Rack Level Infrastructure: Power Delivery
• Line hint: 418

Context Before

Second, some customers, namely Meta, may look to integrate their network switch rack with BBU and CBU shelves for efficiency and peak shaving. This allows more CBU and BBU capacity that wouldn’t have been able to fit in the GPU rack.

Evidence

The BBU/CBU and switch rack will be connected to the GPU rack with 50V horizontal busbars.

Context After

Meta calls this the high power rack, discussed at OCP.

② Atomic Claim

BBU／CBU 與 switch rack，會透過 50V horizontal busbars 連接至 GPU rack。

• Epistemic Mode: ASSERTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/BBU",
        "label": "BBU"
      },
      "role": "backup_power"
    },
    {
      "node": {
        "id": "04_knowledge_base/Capacitor Backup Unit (CBU)",
        "label": "CBU"
      },
      "role": "backup_power"
    },
    {
      "node": {
        "id": "04_knowledge_base/Busbar",
        "label": "busbar"
      },
      "role": "power_interconnect"
    },
    {
      "node": {
        "id": "04_knowledge_base/GPU",
        "label": "GPU"
      },
      "role": "compute_rack_type"
    }
  ],
  "qualifiers": {
    "condition_text": "switch rack is plain text",
    "numeric_mentions": [
      "50V"
    ],
    "temporal_mentions": []
  },
  "relation_type": "BACKUP_SWITCH_RACK_CONNECTS_TO_GPU_RACK_VIA_50V_BUSBAR"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
backup_power	BBU	BBU
backup_power	CBU	04_knowledge_base/Capacitor Backup Unit (CBU)
power_interconnect	busbar	Busbar
compute_rack_type	GPU	GPU

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。