Industry Watch · Published May 18, 2026
Observations on Domestic Database Migration
Migration is the easy part; the next three years of stable operation is the hard part.
We have joined several domestic database migrations in the past two years, from MySQL to distributed domestic systems. The real difficulty is not moving data but long-term compatibility and operations capability.
Post-migration issues
More slow queries: optimisers and execution plans differ, so previously fast SQL needs rewriting.
Driver and pool issues: transaction isolation implementations vary, and pool parameters need retuning.
Missing operations tooling: monitoring, backup and audit are less mature than the old ecosystem.
Reducing risk
Migrate non-core databases first, collect six months of evidence, then touch core business.
Run a full SQL compatibility scan beforehand, listing and rewriting procedures and unusual functions.
Keep a fallback: the old database stays read-only for at least six months for quick comparison.
Database migration is a decade-scale decision. Judge long-term operations, monitoring and staff readiness, not the feature checklist.
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