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CONCELIER-CORE-AOC-19-004 · Backfill prerequisites

Purpose: prep safety rails so CONCELIER-STORE-AOC-19-005 can execute the raw-linkset backfill and rollback without risk to offline kits or prod Mongo.

Inputs

  • Dataset: out/concelier/backfill/linksets-m0.ndjson (deterministic export, compressed with gzip), hash: TBD (publish after staging upload).
  • Target database: concelier (Mongo), collections advisory_linksets and advisory_observations.
  • Offline kit bundle: out/offline/concelier-linksets-m0.tar.gz (mirrors the NDJSON used for Mongo ingest).

Execution checklist

  1. Dry-run import in staging:
    • scripts/concelier/import_linksets.sh --input out/concelier/backfill/linksets-m0.ndjson.gz --dry-run
    • Verify no merge counters / no inferred severity fields.
  2. Backup prod collections:
    • mongodump -d concelier -c advisory_linksets -o backups/2025-11-19-pre-aoc19-004/
    • mongodump -d concelier -c advisory_observations -o backups/2025-11-19-pre-aoc19-004/
  3. Rollback script staged:
    • scripts/concelier/rollback_aoc19_004.sh restores both collections from above dump, then runs db.advisory_linksets.createIndex to re-seat deterministic indexes.
  4. Gate flags:
    • Ensure LinkNotMerge.Enabled=true and AggregationOnly.Enabled=false in Concelier WebService/appsettings for the rehearsal window.
  5. Observability hooks:
    • Enable structured logs Concelier:Backfill:* and SLO timer for import duration.
  6. Determinism probe (post-import):
    • Run dotnet test src/Concelier/__Tests/StellaOps.Concelier.WebService.Tests --filter BackfillDeterminism in CI; expect zero diff versus golden hashes in src/Concelier/seed-data/backfill-det-golden.json.

Rollback procedure

scripts/concelier/rollback_aoc19_004.sh \
  --dump backups/2025-11-19-pre-aoc19-004 \
  --db concelier

Post-rollback verification: rerun the determinism probe and confirm AggregationOnly.Enabled=false.

Evidence to attach after execution

  • Mongo dump hash (SHA256 of archive).
  • Import log excerpt showing counts and zero merge counters.
  • Determinism test TRX.
  • Offline kit bundle hash.

Owners & contacts

  • Concelier Storage Guild (primary)
  • DevOps Guild (rollback + backups)

Notes

  • No schema changes; pure data backfill. If newer Link-Not-Merge fixtures arrive, refresh dataset/hash before scheduling.