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docs: prove sessions are shared by PostgreSQL, not Infinispan replication

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Experiment 0 with three probes: cross-node refresh/logout, cache counter deltas around a single login, and cache entry ownership. Each node caches only what it handled; cache totals sum exactly to the database count.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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DongHyeonka
2026-09-04 09:58:10 +09:00
co-authored by Claude Opus 5
parent 006da7d490
commit e5ebaeb623
20 changed files with 1114 additions and 0 deletions
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docs/evidence/session-replication/02-cache-delta.txt
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===================================================================
실험 0b — Infinispan 이 복제한 것인가, DB 를 같이 본 것인가
===================================================================
수집 시각: 2026-09-04 09:54:41 KST
=== 로그인은 keycloak-0 에만 보냈다 ===
로그인 응답: http_code=200
=== keycloak-0 (로그인을 받은 노드) ===
계수기 캐시 전 후 증가
rpc.replication_count clientSessions 1 1 +0
rpc.replication_count sessions 1 1 +0
approximate_entries_unique clientSessions 1 2 +1 ←
approximate_entries_unique sessions 1 2 +1 ←
hits clientSessions 2 2 +0
hits sessions 2 2 +0
misses clientSessions 2 3 +1 ←
misses sessions 3 4 +1 ←
stores clientSessions 2 3 +1 ←
stores sessions 2 3 +1 ←
=== keycloak-1 (아무 요청도 받지 않은 노드) ===
계수기 캐시 전 후 증가
rpc.replication_count clientSessions 7 7 +0
rpc.replication_count sessions 7 7 +0
approximate_entries_unique clientSessions 0 0 +0
approximate_entries_unique sessions 0 0 +0
hits clientSessions 4 4 +0
hits sessions 4 4 +0
misses clientSessions 0 0 +0
misses sessions 0 0 +0
stores clientSessions 1 1 +0
stores sessions 1 1 +0