SA260324R-0286
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Vera ETL256 - Line hint:
354
Context Before
Each Vera ETL rack consists of 32 compute trays, 16 above and 16 below, arranged symmetrically around four 1U MGX ETL switch trays (based on Spectrum-6) in the middle. The symmetric split is deliberate: it minimizes cable length variance between compute trays and the spine, keeping all connections within copper reach. From each switch tray, rear-facing ports connect to that copper spine for intra-rack communication, while
Evidence
32 front-facing OSFP cages provide optical connectivity to the rest of the POD.
Context After
Networking within the rack uses a Spectrum-X multiplane topology, distributing 200 Gb/s lanes across the four switches to achieve full all-to-all connectivity while maintaining a single network tier. With each compute tray housing 8 Vera CPUs, the result is 256 CPUs per rack, all interconnected over Ethernet through a single, flat network.
② Atomic Claim
前方共有 32 個 OSFP cages，用來提供連往其餘 POD 的 optical connectivity。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"attribute": "FRONT_FACING_CAGE_COUNT_AND_ROLE",
"context_nodes": [],
"entity": {
"id": "04_knowledge_base/OSFP (Octal Small Form-factor Pluggable)",
"label": "OSFP"
},
"frame_type": "ATTRIBUTE",
"qualifiers": {
"condition_text": "POD 與 optical connectivity 沒有 canonical entity",
"numeric_mentions": [
"32"
],
"temporal_mentions": []
},
"value": {
"numeric_mentions": [
"32"
],
"value_text": "32 個前置 OSFP cages 提供通往其餘 POD 的 optical connectivity。"
}
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| entity | OSFP | 04_knowledge_base/OSFP (Octal Small Form-factor Pluggable) |
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。