MigrationShadow: Dual‑Write Rehearsal & 100% Reconciliation
10/10
Demand Score
Data mismatches at cutover trigger rollbacks, missed shipments, and restatements; teams need rehearsals with hard reconciliation evidence.
8/10
Blue Ocean
Competition Level
$4k-25k
Price/Month
Predicted customer spend
12 days
Time to MVP
Difficulty: Hard
The Problem
Data Migration Failures:
Competitor Landscape
- Delphix
- Tricentis Data Integrity
- Informatica Cloud DQ
- SNP CrystalBridge
- Fivetran/HVR
Must-Have Features for MVP
Shadow target instance orchestration with cost controls
CDC connectors (e.g., Oracle GG, Debezium) with idempotency keys
Schema-diff and mapping test harness (deterministic fixtures)
Full and sampled reconciliation engine with business-key awareness
Data quality rules DSL and exception workflows
Cutover timer with auto-rollback plan generation
PII masking and audit trails for SOX/GxP compliance
⚠️ Potential Challenges
- Load on source systems from CDC/dual-write
- PII handling and cross-border data residency
- Idempotency and ordering guarantees
- Complex custom mappings and legacy codepages
Risk Level: High
🎯 Keys to Success
- Zero critical mismatches in final dress rehearsal
- 50% reduction in cutover window duration
- Auditor sign-off on evidence pack pre-go-live
- No unplanned rollback in first 90 days post-migration
Ready to Build This?
This hard-difficulty project could be your next micro-SaaS success.