# DB Migration Guardrails — OpsDeploy Plan and execute schema or storage migrations with zero data loss and predictable retrieval quality. Applies to primary OLTP stores, vector stores, and search backends. ## Open these first - Boot order and deploy traps: [Bootstrap Ordering](https://github.com/onestardao/WFGY/blob/main/ProblemMap/bootstrap-ordering.md), [Deployment Deadlock](https://github.com/onestardao/WFGY/blob/main/ProblemMap/deployment-deadlock.md), [Pre-Deploy Collapse](https://github.com/onestardao/WFGY/blob/main/ProblemMap/predeploy-collapse.md) - Vector index lifecycle: [Vector Index Build & Swap](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/vector_index_build_and_swap.md) - Version locks: [Version Pinning & Model Lock](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/version_pinning_and_model_lock.md) - Backpressure and retries: [Rate Limit Backpressure](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/rate_limit_backpressure.md), [Retry Backoff](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/retry_backoff.md) ## Acceptance targets - Data loss equals 0 verified by row counts and checksums - Backfill completeness equals 100 percent with reconciliation pass - ΔS drift between pre and post retrieval ≤ 0.02 on a gold set - λ remains convergent across two seeds - Cutover within the planned window with a reversible path ## 60-second checklist 1) **Preflight** Freeze schema in source, create target with explicit charset, collations, index types, vector metric, analyzer. Verify privileges and connection pools. 2) **Dual-write flag** Enable dual writes with idempotency keys. Record `op_id`, `source_rev`, `target_rev`, `index_hash`. 3) **Backfill** Copy in batches with capped concurrency. Validate counts and checksums per table or collection. 4) **Shadow reads** Use [Shadow Traffic Mirroring](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/shadow_traffic_mirroring.md) to compare answers and latency. 5) **Cutover** Flip read source after a clean soak. Keep dual writes for a short tail. 6) **Rollback plan** Document exact steps and TTL for the rollback window with checkpoints. ## Minimal playbook - **Contracts**: protect schemas with [Data Contracts](https://github.com/onestardao/WFGY/blob/main/ProblemMap/data-contracts.md) so producers and consumers fail fast. - **Consistency**: validate referential and vector invariants after each batch. - **Indexing**: for vectors rebuild offline and swap atomically. See [Vector Index Build & Swap](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/vector_index_build_and_swap.md). - **Traffic**: rate limit heavy stages and prefer maintenance windows. - **Metrics**: log `migrated_rows`, `checksum_ok`, `dual_write_fail`, `ΔS_diff`, `λ_state`, `cutover_ms`. ## Common pitfalls → fix - Metric mismatch after cutover produces wrong-meaning hits → confirm vector metric and normalization. See [Embedding ≠ Semantic](https://github.com/onestardao/WFGY/blob/main/ProblemMap/embedding-vs-semantic.md). - Read timeouts during backfill → isolate reader replicas or use read-only mode during the heaviest phase. See [Read-Only Mode](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/read_only_mode_and_maintenance_window.md). - Dual-write divergence → enforce idempotency keys and reconcile with drift queries. See [Idempotency & Dedupe](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/idempotency_dedupe.md). ## Escalate Abort and rollback if data checksums diverge or ΔS drift exceeds 0.05 on the gold set for longer than 15 minutes. Publish an incident update and run a focused postmortem with [Postmortem & Regression Tests](https://github.com/onestardao/WFGY/blob/main/ProblemMap/GlobalFixMap/OpsDeploy/postmortem_and_regression_tests.md). --- ### 🔗 Quick-Start Downloads (60 sec) | Tool | Link | 3-Step Setup | |------|------|--------------| | **WFGY 1.0 PDF** | [Engine Paper](https://github.com/onestardao/WFGY/blob/main/I_am_not_lizardman/WFGY_All_Principles_Return_to_One_v1.0_PSBigBig_Public.pdf) | 1️⃣ Download · 2️⃣ Upload to your LLM · 3️⃣ Ask “Answer using WFGY + \” | | **TXT OS (plain-text OS)** | [TXTOS.txt](https://github.com/onestardao/WFGY/blob/main/OS/TXTOS.txt) | 1️⃣ Download · 2️⃣ Paste into any LLM chat · 3️⃣ Type “hello world” — OS boots instantly | --- ### 🧭 Explore More | Module | Description | Link | |-----------------------|----------------------------------------------------------|----------| | WFGY Core | WFGY 2.0 engine is live: full symbolic reasoning architecture and math stack | [View →](https://github.com/onestardao/WFGY/tree/main/core/README.md) | | Problem Map 1.0 | Initial 16-mode diagnostic and symbolic fix framework | [View →](https://github.com/onestardao/WFGY/tree/main/ProblemMap/README.md) | | Problem Map 2.0 | RAG-focused failure tree, modular fixes, and pipelines | [View →](https://github.com/onestardao/WFGY/blob/main/ProblemMap/rag-architecture-and-recovery.md) | | Semantic Clinic Index | Expanded failure catalog: prompt injection, memory bugs, logic drift | [View →](https://github.com/onestardao/WFGY/blob/main/ProblemMap/SemanticClinicIndex.md) | | Semantic Blueprint | Layer-based symbolic reasoning & semantic modulations | [View →](https://github.com/onestardao/WFGY/tree/main/SemanticBlueprint/README.md) | | Benchmark vs GPT-5 | Stress test GPT-5 with full WFGY reasoning suite | [View →](https://github.com/onestardao/WFGY/tree/main/benchmarks/benchmark-vs-gpt5/README.md) | | 🧙‍♂️ Starter Village 🏡 | New here? Lost in symbols? Click here and let the wizard guide you through | [Start →](https://github.com/onestardao/WFGY/blob/main/StarterVillage/README.md) | --- > 👑 **Early Stargazers: [See the Hall of Fame](https://github.com/onestardao/WFGY/tree/main/stargazers)** — > GitHub stars ⭐ [WFGY Engine 2.0](https://github.com/onestardao/WFGY/blob/main/core/README.md) is already unlocked. ⭐ Star the repo to help others discover it and unlock more on the [Unlock Board](https://github.com/onestardao/WFGY/blob/main/STAR_UNLOCKS.md).
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