Data Migration

Handle data and schema migrations safely.

Migration Checklist

Schema Migration

• Define forward and reverse schema migration scripts
• Verify schema changes are backward compatible where needed
• Check for data type changes that may cause truncation or loss
• Ensure index and constraint updates are included

Data Format Conversion

• Identify all serialization format changes
• Implement data transformation for existing records
• Verify date, time, and locale format compatibility
• Check for encoding changes affecting stored data

Configuration Migration

• Map old configuration keys to new equivalents
• Provide default values for newly required settings
• Validate migrated configuration against new schema
• Ensure environment-specific overrides are preserved

Data Integrity

• Verify referential integrity after migration
• Run checksums or row counts to confirm completeness
• Check for orphaned records or dangling references
• Validate business logic constraints on migrated data

Output Format

Report findings with risk ratings:

Risk	Description
Critical	Data loss or corruption possible, blocks migration
High	Data integrity at risk, requires careful validation
Medium	Format change may affect downstream consumers
Low	Minor configuration update, low risk of issues