Challenge
One critical app, spread across three hypervisors.
The client relied on a business-critical legacy application that had become deeply embedded in daily operations over many years. Through organic growth and historical decisions, the environment ended up distributed across three independent hypervisor platforms — a real source of operational complexity.
That fragmentation raised maintenance overhead, complicated backup and disaster recovery, and added risk during upgrades and support. Because the system underpinned essential business processes, any interruption could hit production and continuity directly.
The objective: consolidate all workloads onto a single modern virtualization platform while preserving application functionality, maintaining data integrity, and minimizing disruption.
Solution
A phased consolidation onto one platform.
A phased migration strategy was developed to carefully assess application dependencies, infrastructure requirements, and data relationships across all systems.
The project included
- Comprehensive infrastructure audit
- Virtual machine dependency mapping
- Storage and network redesign
- Hypervisor standardization
- Incremental workload migration
- Validation and rollback procedures
- Backup and disaster recovery modernization
To avoid disruption, migration ran primarily during evenings and weekends over a four-month period — and each workload was validated after migration for application compatibility, performance stability, and data consistency.
Results
Three platforms down to one — no data lost.
- Reduced infrastructure complexity and administrative overhead
- Improved backup and disaster recovery capabilities
- Increased platform stability and maintainability
- Established a standardized foundation for future growth
Technical specifications
Infrastructure, stack and activities.
Infrastructure
- 3 independent hypervisor environments
- 60+ virtual machines
- Enterprise SAN / NAS storage
- Multi-site backup infrastructure
Technologies
- Proxmox VE
- VMware ESXi
- Hyper-V
- Linux & Windows Servers
- NGINX
- MSSQL / PostgreSQL
- Backup & replication solutions
Migration activities
- VM conversion & consolidation
- Storage migration
- Network reconfiguration
- Service dependency validation
- Application testing
- Disaster recovery optimization