SA260324R-0177
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Inter-node/Intra-rack - Line hint:
213
Context Before
Each LPU connects to one LPU from each of the 15 other nodes in the server. Each of these inter-node links is 2x100G so there are 15x2x100G inter-node links coming out of each LPU. These inter-node links are via a copper cable backplane. In addition, each FPGA also connects to an FPGA in every other node at either 25G or 50G per link for 15x25G/50G.
Evidence
This also goes through the backplane.
Context After
This means that each node has 16 x 15 x 2 lanes for inter-node C2C and 2 x 15 lanes for inter-node FPGA which is a total of 510 lanes or 1020 differential pairs (for Rx and Tx). Therefore, the backplane is 16 x 1020/2 = 8,160 differential pairs – we divide by 2 as each device Tx channel is a corresponding device’s Rx channel.
② Atomic Claim
這些連線同樣會經過 backplane。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"attribute": "CARRIES_INTER_NODE_LINKS",
"context_nodes": [],
"entity": {
"id": "04_knowledge_base/Backplane",
"label": "backplane"
},
"frame_type": "ATTRIBUTE",
"qualifiers": {
"condition_text": "This 的指涉承接前一條 FPGA inter-node links",
"numeric_mentions": [],
"temporal_mentions": []
},
"value": {
"numeric_mentions": [],
"value_text": "承載前文所述的 inter-node FPGA links。"
}
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| entity | backplane | Backplane |
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。