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document-haness/docs/keycloak-session-store/final/evidence/raw/a3-database-crash__01-crash-injection.txt
T
DongHyeonkaandClaude Opus 5 b2963105a8 docs(keycloak-session-store): import the session-storage lab as a new project
The keycloak project ended with four open questions that design could not
settle. A two-VM lab was built to answer them by measurement, and this is
that material: 26 experiments, 125 raw command outputs, 22 browser captures.

Follows the import procedure in README.md.

  source/     the originating repository verbatim — 78 documents, 28 SVGs,
              8 manifests, plus .source-revision recording the commit
  final/      the SSOT
    document.md   729 lines written from the 29 experiment documents, not
                  concatenated: what was predicted, what was measured, and
                  where the measurement itself was wrong
    evidence/raw    125 outputs, flattened to <experiment>__<file> because
                    the originals collided (01-baseline.txt appeared three
                    times) and the audit only globs the top level
    evidence/meta   one per raw file; command and exitCode are null and the
                    README says why rather than inventing them
    evidence/browser  22 captures
    assets/       three diagrams through techviz
    .techviz/     their VizSpecs

A separate project rather than an addition to keycloak: the B-layer answers
that project's four questions, but the A, C and D layers are about cluster
failure, SSO and operations, and one document.md should hold one subject.
The four question records there can point here through 관계.

Recorded rather than papered over: only three of the 28 diagrams were
remade. The repository forbids hand-drawn SVG and forbids titles inside the
canvas; all 28 originals carry both, so converting them is redrawing, not
reformatting. They stay in source/ and the gap is written into the document.

verify-pipeline.py passes. audit-records.py reports no issues.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-04 22:51:59 +09:00

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=== [준비] 손실 측정 설계 확인 ===
LAST_SESSION_REFRESH 는 integer(초) — 200ms 손실은 보이지 않는다
created_on | integer | | not null |
last_session_refresh | integer | | not null | 0
"idx_user_session_expiration_created" btree (realm_id, offline_flag, remember_me, created_on, user_session_id, user_id)
"idx_user_session_expiration_last_refresh" btree (realm_id, offline_flag, remember_me, last_session_refresh, user_session_id, user_id)
→ 대신 행 존재 여부로 잰다. 로그인 하나 = 행 하나 = 이진 판정
전역 synchronous_commit: on
=== [1] 빠른 연속 로그인을 백그라운드로 시작 ===
루프 시작
6초 경과 — 지금까지 성공한 로그인: 0
=== [2] PostgreSQL 강제 종료 (SIGKILL) ===
종료 시각: 12:00:26.511
pod "postgres-7b474b88c8-xc2vt" force deleted from keycloak-lab namespace
삭제 반환: 12:00:26.586
클라이언트가 200 을 받은 로그인 수: 0