Modernising Legacy Systems Without Disruption
Incremental strategies that replace ageing software while the business keeps running.
By SysInteractive Team
Big-bang rewrites are risky. Incremental modernisation delivers value sooner and reduces the chance of costly failure.
The strangler pattern
Route specific capabilities to new services one at a time, gradually retiring the old system as each piece is replaced.
Protect the data
Data migration is often the hardest part. Plan reconciliation checks, rehearse migrations and keep rollback options available.
- Map dependencies before you start
- Add tests around existing behaviour
- Release in small, reversible steps