Target service
Azure SQL Database, Azure SQL Managed Instance and SQL Server on Azure virtual machines solve different needs. The target must be selected based on compatibility, operational responsibility and workload requirements.
SQL Server to Azure SQL
Modernise the database without disrupting the processes built around it.
Moving an on-premise SQL Server environment to Azure SQL can reduce infrastructure responsibility and improve cloud integration, but the database is rarely isolated. Applications, reports, jobs, security, integrations and operating procedures all need to be assessed together.
Why organisations migrate
SQL Server to Azure SQL
- reduce on-premise infrastructure responsibility
- improve resilience and managed-service capabilities
- support cloud applications and analytics
- modernise security and access patterns
- remove hardware and operating-system lifecycle constraints
- align databases with Azure and Microsoft data-platform strategy
What must be decided first
Translate what matters before rebuilding.
Application compatibility
Applications may depend on instance-level features, linked servers, SQL Agent jobs, file access, authentication methods or network assumptions that need redesign.
Performance model
On-premise hardware characteristics do not translate directly into Azure service tiers. Workload patterns and peak behaviour should guide sizing and testing.
Security and connectivity
Identity, firewall, private connectivity, secrets and access ownership need to be designed before cutover.
Operational model
Backup, recovery, monitoring, patching, support and cost ownership change in a managed cloud environment.
Key risks
Common migration risks.
- selecting the Azure service before understanding dependencies
- overlooking unsupported features or external jobs
- sizing from database volume alone
- introducing latency between applications and databases
- incomplete identity and network design
- missing reconciliation and rollback criteria
- moving technical debt without simplifying the environment
What should be assessed
Assessment scope.
- SQL Server versions, editions and database inventory
- workload and performance patterns
- application, report and integration dependencies
- SQL Agent jobs, linked servers and instance-level features
- authentication, users and service accounts
- backup, recovery and availability requirements
- data growth and retention
- target Azure service options
- migration method, validation, cutover and rollback
Recommended approach
Move through controlled stages.
- Inventory databases, workloads and dependencies
- Run compatibility and feature assessment
- Define the Azure target and network / identity architecture
- Establish performance baseline and sizing assumptions
- Select migration and synchronization method
- Test representative workloads
- Rehearse validation, cutover and rollback
- Migrate in controlled waves
- Monitor and optimize after go-live
Rationalisation guidance
Not every database, job or integration should move unchanged. Retire obsolete databases, consolidate duplicated environments and redesign fragile file-based or server-specific dependencies where practical.
Validation and cutover
Validation should cover row counts, financial or operational totals, application behaviour, report refresh, integration results, security and performance. A documented rollback decision point is essential for critical workloads.
FAQ
Questions before migration.
Is Azure SQL Database always the best target?
No. Azure SQL Database offers a highly managed model, while Managed Instance or SQL Server on Azure virtual machines may be more suitable when instance-level compatibility or operating requirements are stronger.
Can the migration happen with limited downtime?
Often yes, but the feasible approach depends on the source version, target service, data volume, change rate and available migration tooling. Downtime expectations must be confirmed during assessment.
How should the Azure SQL environment be sized?
Use actual workload, peak usage, latency and performance baselines. Database size alone is not enough.
What happens to SQL Agent jobs and linked servers?
They must be inventoried and either redesigned, moved to supported services or handled through a target platform that preserves the required capability.
Can rockaBI migrate only the analytical databases?
Yes. The scope can focus on data warehouse, reporting or analytical workloads, provided their application and integration dependencies are understood.
Migration Assessment
Planning a migration but unsure what should move first?
A Migration Assessment helps clarify the real scope, hidden dependencies, rationalisation opportunities and the safest path toward the target platform.
Migration Assessment
Planning a migration but unsure what should move first?
A Migration Assessment helps clarify the real scope, hidden dependencies, rationalisation opportunities and the safest path toward the target platform.