DongHyeonkaandClaude Opus 5
75bed382c8
The originating repository's SVGs were drawn by hand and every one of them
put a title, a subtitle and an explanation band inside the canvas. This
repository forbids both, so they could not be carried over — the whole set
was rebuilt through the skill's pipeline instead.
Each diagram went through prepare, references, prompt, a VizSpec 1.1 citing
document line ranges, lint, and render. All 28 pass lint and produce the
same eight formats the existing keycloak project has. Sentences moved out of
the canvas into <desc> and the paragraph beside each figure; the drawings
carry names only.
Two lint rules did real work rather than formatting work:
edge-through-node caught arrows crossing an unrelated
node and implying an adjacency that
does not exist — four diagrams had to
be restructured, not just relaid out
evidence-outside-prepared-context caught a diagram citing another
section; its anchor moved from B-0 to
B-1 so all three sections it draws on
are inside the prepared context
lab-topology also had to change profile: its context offers a different
candidate set, and query-fanout with shard roles is what the section
actually shows — one entry point spreading to two Keycloak nodes.
The document now carries all 28 inline, one per claim that needed one, and
the section recording what was still missing is updated: the diagram gap is
closed, Studio records remain.
verify-pipeline.py passes. audit-records.py reports no issues.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
1.3 KiB
1.3 KiB
200 과 디스크 사이의 빈 구간
Alternative text
클라이언트가 200 을 받은 뒤에도 WAL 이 아직 디스크에 닿지 않은 구간이 남아 있는 구성.
Long description
Keycloak 은 트랜잭션마다 SET LOCAL synchronous_commit TO OFF 를 건다. PostgreSQL 은 COMMIT 을 WAL 디스크 기록을 기다리지 않고 즉시 반환하고, 클라이언트는 200 과 토큰을 받는다. 실측된 wal_writer_delay 는 200ms 이며 그 사이에 프로세스가 죽으면 그만큼이 사라진다. 153건 중 4건이 그렇게 유실됐다. 버그가 아니라 의도된 설계이고 그 대가를 숫자로 확인한 것이다.
Elements and evidence
- 클라이언트 (actor): 200 과 토큰을 받는다. Evidence: L207–L213.
- Keycloak (service): 트랜잭션마다 synchronous_commit 을 끈다. Evidence: L211–L215.
- PostgreSQL (datastore): COMMIT 을 즉시 반환한다. WAL 은 아직 메모리에 있다. Evidence: L211–L215.
- 디스크의 WAL (datastore): 여기 닿아야 살아남는다. Evidence: L207–L215.
Relationships
- 클라이언트 → Keycloak: 로그인 요청. Evidence: L207–L211.
- Keycloak → PostgreSQL: 세션 INSERT · COMMIT. Evidence: L211–L215.
- PostgreSQL → 디스크의 WAL: 지연된 WAL 기록. Evidence: L211–L215.