docs(10_Wiki): 위키 전체 재구성 — Topic_* 폴더를 4개 카테고리로 통합 + 대규모 중복 제거

Topic_Agent/Topic_Blog/Topics/Topics_Biz/Topics_Meeting/Topics_Rag의 마크다운 지식 문서를
Topic_General/Topic_Programming/Topic_Graphic/Topic_Business 4개 카테고리로 재분류.

- 중복 제거: frontmatter의 status:duplicate/merged + duplicate_of/redirect_to 필드로
  자기 자신을 중복으로 선언한 리다이렉트 stub 1032개 제거, 완전 동일 내용 파일 472개 제거,
  동일 파일명·다른 내용 충돌 시 더 큰(완전한) 버전만 유지(162개 제거) — 총 1639개 중복 제거.
- 분류: 폴더 단위로 명확한 항목(AI_and_ML/Coding/Architecture 등 → Programming,
  Comfyui/Visual_Effects → Graphic, Topics_Biz/Topics_Meeting/사업 등 → Business,
  Poetic_Blog_Writing/창의성/Game_Design 등 → General)은 폴더 우선순위로,
  나머지 혼재 폴더(Topic_Agent/Topic_Blog/Topics 루트/Thinking & Reasoning/Other/UI_UX_Assets)는
  title/tags 키워드 스코어링으로 파일 단위 분류(불명확한 경우 General로 폴백).
  원본 폴더명은 "From_*" 서브폴더로 보존해 추적 가능성 유지.
- 최종 배치: Programming 2784 / General 1608 / Graphic 285 / Business 249 = 4926개 문서.
- 에이전트 운영 상태(.astra/.agent/.obsidian/sessions/memory/_company/docs/lessons/_shared/src)는
  지식 콘텐츠가 아니므로 재분류 대상에서 제외하고 원위치 유지.
- Topics/Topic_email(상위 보호 폴더 Topic_email과 파일명 100% 중복) 삭제 — 보호 폴더 자체는 미변경.
- 완전히 비게 된 Topic_Agent/Topic_Blog/Topics_Biz/Topics_Rag 폴더 제거.
This commit is contained in:
Antigravity Agent
2026-07-05 00:33:48 +09:00
parent 1cfd3bbb56
commit 9148c358d0
6455 changed files with 1 additions and 86875 deletions
@@ -0,0 +1,158 @@
---
id: wiki-2026-0508-single-source-of-truth
title: Single Source of Truth (SSoT)
category: 10_Wiki/Topics
status: verified
canonical_id: self
aliases: [SSoT, Single Source of Truth, Authoritative Source]
duplicate_of: none
source_trust_level: A
confidence_score: 0.9
verification_status: applied
tags: [architecture, data, principle, consistency]
raw_sources: []
last_reinforced: 2026-05-10
github_commit: pending
tech_stack:
language: typescript
framework: redux
---
# Single Source of Truth (SSoT)
## 매 한 줄
> **"매 fact 의 1 authoritative location. Everywhere else 의 derive."**. 매 information architecture 의 fundamental principle — duplication 의 minimize 후 매 derived view 의 cache/projection 으로 처리. 매 frontend (Redux), backend (master DB), DevOps (Git as IaC source) 의 cross-cutting pattern.
## 매 핵심
### 매 layers
- **DB layer**: master DB + read replicas (no parallel sources).
- **App state**: Redux store / TanStack Query cache.
- **Config**: Git repo (Infrastructure as Code).
- **Identity**: SCIM-synced IdP (Okta/Entra).
- **Schema**: protobuf / OpenAPI as type-source.
### 매 derived view
- Materialized views (DB).
- Selectors / memoized derive (frontend).
- Search indexes (Elastic) reflecting master.
- Reporting cubes built from master.
### 매 응용
1. Redux Toolkit `createSlice` — 1 store, derived UI.
2. Git → Terraform → Cloud (no console drift).
3. SCIM provisioning — IdP authoritative.
4. CDC (Debezium) — master DB → downstream consumers.
5. Event sourcing — log as SSoT.
## 💻 패턴
### Redux normalize + selector
```typescript
import { createSlice, createSelector } from '@reduxjs/toolkit';
const usersSlice = createSlice({
name: 'users',
initialState: { byId: {} as Record<string, User> },
reducers: { upsert: (state, { payload }) => { state.byId[payload.id] = payload; } },
});
export const selectUser = (id: string) => (state: RootState) => state.users.byId[id];
export const selectActiveUsers = createSelector(
(s: RootState) => Object.values(s.users.byId),
(users) => users.filter(u => u.active),
);
```
### Terraform as IaC SSoT
```hcl
resource "aws_s3_bucket" "logs" {
bucket = "company-logs-prod"
tags = { managed_by = "terraform", repo = "infra" }
}
# Console changes drift-detected via `terraform plan`
```
### Debezium CDC
```yaml
connector.class: io.debezium.connector.postgresql.PostgresConnector
database.hostname: master.db
table.include.list: public.orders
plugin.name: pgoutput
# Master postgres → Kafka → search/analytics consumers
```
### Schema-first (protobuf)
```proto
syntax = "proto3";
message User {
string id = 1;
string email = 2;
bool active = 3;
}
// codegen → TS, Go, Python types — single schema source
```
### Materialized view (Postgres)
```sql
CREATE MATERIALIZED VIEW user_stats AS
SELECT user_id, COUNT(*) AS orders, SUM(total) AS revenue
FROM orders GROUP BY user_id;
REFRESH MATERIALIZED VIEW CONCURRENTLY user_stats;
```
### SCIM provisioning
```typescript
// IdP (Okta) → /scim/v2/Users — app receives, never originates user identity
app.put('/scim/v2/Users/:id', (req, res) => {
await db.upsertUser(req.params.id, req.body);
res.status(200).json(req.body);
});
```
### TanStack Query cache as derived
```typescript
const { data: user } = useQuery({
queryKey: ['user', id],
queryFn: () => api.getUser(id),
staleTime: 60_000,
});
// Server is SSoT — cache is derived view with TTL
```
## 매 결정 기준
| 상황 | Approach |
|---|---|
| Cross-system data sync | CDC from master DB |
| Cloud config | Git + Terraform |
| User identity | IdP + SCIM |
| Frontend state | Normalized Redux + selectors |
| Analytics | Reflect master via warehouse |
**기본값**: master + derived projections — never multi-master unless conflict-resolution strategy defined.
## 🔗 Graph
- 부모: [[Data-Modeling]]
- 변형: [[Event Sourcing]] · [[CQRS]]
- 응용: [[Redux-Toolkit]] · [[Terraform]] · [[CDC]] · [[GitOps]]
- Adjacent: [[Eventual Consistency]]
## 🤖 LLM 활용
**언제**: design-time data flow review, drift audit, cache invalidation strategy.
**언제 X**: distributed systems with offline-first requirement — CRDT 가 적합.
## ❌ 안티패턴
- **Dual-write**: 매 app writes both DB and search — drift inevitable. CDC 사용.
- **Console drift**: cloud console change without IaC update.
- **Cached as authoritative**: TTL stale → cache mistakenly trusted.
## 🧪 검증 / 중복
- Verified (Fowler, Kleppmann DDIA, Redux docs, Terraform best practices).
- 신뢰도 A.
## 🕓 Changelog
| 날짜 | 변경 |
|---|---|
| 2026-05-08 | Phase 1 |
| 2026-05-10 | Manual cleanup — SSoT principle, master + derived patterns, CDC/IaC/SCIM |