VR2R-0236_r1

VR2R-0236

① SA Source

• Source: 開啟完整 SA 文章
• Section: BlueField-4
• Line hint: 202

Context Before

BlueField-4 will be the silicon anchor of this third network. Positioned on the storage array, it terminates NVMe-oF and RDMA traffic at line rate and manages KV movement independently of host CPUs and GPUs. With 2×400G SerDes links providing 800Gb/s of bandwidth, integrated Grace CPU, and

Evidence

LPDDR, BlueField-4 would act as the controller for a distributed context memory fabric.

Context After

In a preferred DGX-style configuration, a single BlueField-4 per tray may serve four Rubin processors, with the DPU dedicated purely to KV cache traffic and not shared with generic storage I/O.

② Atomic Claim

搭配 LPDDR，BlueField-4 將作為 distributed context memory fabric 的 controller。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/LPDDR",
        "label": "LPDDR"
      },
      "role": "memory"
    },
    {
      "node": {
        "id": "04_knowledge_base/BlueField-4",
        "label": "BlueField-4"
      },
      "role": "controller"
    }
  ],
  "qualifiers": {
    "condition_text": "distributed context memory fabric is plain text",
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "relation_type": "BLUEFIELD4_CONTROLS_DISTRIBUTED_CONTEXT_MEMORY"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
memory	LPDDR	LPDDR
controller	BlueField-4	BlueField-4

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。