Zero-downtime Azure migration for a Manchester scheduling SaaS
Workforce scheduling SaaS firm, Manchester
- Challenge
- The platform ran on two rented servers in a colocation facility. A disk failure had caused a nine-hour outage, customers were asking about resilience in procurement questionnaires, and the engineering team of six had no capacity to plan a migration while shipping features.
- Solution
- AGS designed an Azure landing zone with infrastructure as code, containerised the application and moved the database using replication so cut-over happened in a maintenance window of minutes. We ran two rehearsals, handed over runbooks and stayed on for hypercare for the first month.
- Results
- Cut-over completed with 4 minutes of planned downtime
- Monthly hosting cost down 23% against colocation
- Migration delivered in 9 weeks