{
  "schema": "pg36-ch17-fixture-manifest-v1",
  "fixture": "ch17-analytics-v1",
  "generator": {
    "identity": "fixture-generator-v1",
    "tenant_count": 8,
    "accounts_per_tenant": 50,
    "day_count": 120,
    "sales_per_account_day": 5,
    "first_day": "2026-01-01",
    "last_day": "2026-04-30",
    "frozen_at": "2026-07-29T00:00:00Z"
  },
  "local": {
    "accounts": 400,
    "sales": 240000,
    "units": 1200000,
    "amount": "2256000.00",
    "daily_summary_rows": 2880,
    "monthly_rows": 32,
    "business_checksum": "42fb8ab5444469eba1f104a8e1e529dd",
    "monthly_checksum": "644d45544ebbc2a80c42270c38ac6885"
  },
  "distribution": {
    "strategy": "explicit LIST routing by tenant identity",
    "modulus": 2,
    "shard_a": {
      "database": "pg36_shard_a",
      "remainder": 0,
      "tenant_ids": [2, 4, 6, 8],
      "accounts": 200,
      "sales": 120000,
      "units": 599988,
      "amount": "1188000.00",
      "checksum": "274002669404fbcd449bdecd929624e3"
    },
    "shard_b": {
      "database": "pg36_shard_b",
      "remainder": 1,
      "tenant_ids": [1, 3, 5, 7],
      "accounts": 200,
      "sales": 120000,
      "units": 600012,
      "amount": "1068000.00",
      "checksum": "0bb770361058ec76ebc81a2a7d1e2629"
    }
  },
  "frozen_export": {
    "path": "frozen-monthly.csv",
    "rows": 32,
    "sha256": "64b045809e10364fd84a587121d919e8562a15335c4c6c015e91a0ead3a44323"
  },
  "loaders": {
    "coordinator": {
      "path": "fixture.sql",
      "sha256": "3110d0369b0c62fffeee643200f5320d1f6bd26ad5f9950b2ab2b58991080e10"
    },
    "remote": {
      "path": "fixture-remote.sql",
      "sha256": "da02dbca8d2cfeb0294c369b15cad3619a9433d984f98866b5043eb4508e3e91"
    }
  },
  "evidence_contract": {
    "selective_tenant": 3,
    "selective_from": "2026-04-01",
    "selective_sales": 7500,
    "selective_amount": "69375.00",
    "naive_foreign_rows": 240000,
    "two_stage_foreign_rows": 960,
    "application_write_sqlstate": "42501",
    "failed_shard_sqlstate": "08001"
  },
  "authentication": {
    "lab_transport": "same-host Unix-domain socket",
    "password_required": false,
    "production_approved": false,
    "warning": "password_required=false is an isolated loopback-lab shortcut, not a production credential pattern"
  },
  "license": {
    "text": "project-owned deterministic synthetic fixture; repository terms apply",
    "external_dataset": false
  },
  "limitations": [
    "All three databases run in one PostgreSQL instance on one host.",
    "The fixture proves routing, pruning, pushdown, transfer shape, permissions, failure semantics, and rebuildability; it is not a distributed throughput or high-availability benchmark.",
    "EXPLAIN row counts describe this frozen fixture and must not be generalized into universal product comparisons.",
    "The explicit LIST partitions encode the fixture tenant set; a production shard map needs a reviewed routing and rebalance mechanism.",
    "The lab deliberately retains the two empty shard database shells after reset.",
    "Coordinator and shard reset steps are individually transactional but cannot form one atomic transaction across three databases."
  ]
}