What puts migration on the agenda
For most organizations, cloud migration starts with a calendar event: a contract coming up for renewal, hardware reaching the end of its life, a licensing model change, or demand outgrowing capacity. Sanal Çekirdek uses these moments to revisit workload placement; deciding what stays in place is as much a part of the plan as deciding what moves.
- Contract and facility renewal dates
- Hardware lifecycle and warranty expiry
- Licensing and support model changes
- Scale and capacity pressure
Discovery and wave planning
Planning starts with application and dependency discovery, grouping systems that must move together onto one map. Each application then passes through a decision framework: migrating as-is (rehost), moving with a platform change (replatform) or restructuring the application (refactor) are compared on cost and risk. The migration order runs in waves, from lower-risk workloads toward critical systems.
- Application and dependency map
- Per-workload migration method decision
- Wave sequence and prerequisites
- Acceptance criteria for every wave
Outage window and rollback
An outage window is planned for each wave and narrowed through rehearsal. Data is synchronized with the target environment ahead of time, so cutover transfers only the final delta. If acceptance criteria are not met, the wave is rolled back to the original environment through predefined steps.
- Migration rehearsal in a test environment
- Data synchronization and delta transfer
- Per-application outage window plan
- Defined rollback steps and decision point
Post-migration validation and handover
A migration is not complete until the application is verified in its new environment. Performance is compared against pre-migration baselines; backup and monitoring are re-established, and resources are tagged for cost visibility. The process closes with a responsibility matrix and operational documentation, and the old environment is retired in a controlled way.
- Performance comparison report
- Backup, monitoring and alerting setup
- Tagging and cost reporting
- Operational handover and environment retirement
