VR2R-0640_r1

VR2R-0640

① SA Source

• Source: 開啟完整 SA 文章
• Section: Ethernet-Based Cluster Deployments
• Line hint: 550

Context Before

Recall from above that a Vera Rubin NVL72 cluster built with Q3400-X800 switches at 1.6T logical ports per GPU cannot scale beyond the maximum cluster size of 93,312 GPUs.

Evidence

Even if future switch generations continue to double the maximum possible switching capacity per switch box, the per GPU bandwidth is also expected to double, which means that the effective logical port count in a cluster network is unlikely to change.

Context After

What this means is that deployment of large-scale GPU clusters will continue to require multi-plane network architectures. Do note however that multi-plane networking architectures are not limited by size and we have also seen NVIDIA reference architecture deployments with multi-plane clusters that are significantly below 100k GPUs each.

② Atomic Claim

即使未來每一代 switch 的單一 switch box 最大 switching capacity 繼續倍增，每顆 GPU 的 bandwidth 也預期會同步倍增，因此 cluster network 的有效 logical port 數量可能不會明顯改變。

• Epistemic Mode: EXPECTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "attribute": "FUTURE_BANDWIDTH_SCALING_VERSUS_LOGICAL_PORT_COUNT",
  "context_nodes": [],
  "entity": {
    "id": "04_knowledge_base/GPU",
    "label": "GPU"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": "conditional forecast; switch box and logical port are plain text",
    "numeric_mentions": [
      "2x"
    ],
    "temporal_mentions": [
      "future switch generations"
    ]
  },
  "value": {
    "numeric_mentions": [
      "2x"
    ],
    "value_text": "future switch capacity and per-GPU bandwidth are both expected to double, leaving effective logical-port count roughly unchanged."
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	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。