--- title: "Cloud strategy and migration" description: "Cloud strategy, landing zones and migration from on-premises or another provider, staged behind validation gates with rollback agreed in advance." url: https://www.expandware.com/services/cloud/cloud-strategy-and-migration/ section: "Services" topics: ["Cloud", "AWS Well-Architected", "Microsoft Cloud Adoption Framework", "Google Cloud Architecture Framework", "Terraform"] publisher: "Expandware Private Limited" --- # Cloud strategy and migration Cloud strategy, landing zones and migration from on-premises or another provider, staged behind validation gates with rollback agreed in advance. Cloud architecture built for scale, resilience and cost control. Cloud bills grow quietly and architectures age loudly. We design and migrate cloud environments that hold up under production load, meet availability targets and stay economically sane, whether that means one platform done properly or a deliberate multicloud footprint. Every migration starts from the workloads, their dependencies and their data, so the order of moves follows risk rather than convenience. Where it usually starts: - A data center lease, a hardware refresh or a VMware renewal is forcing a decision. - Workloads were lifted into the cloud and now cost more than they did on premises. - Nobody has a current map of what depends on what. - A regulator or customer needs to know where data will live after the move. What is included: - Strategy and business case: Which workloads move, where and why, with the costs compared honestly. - Discovery and dependency mapping: Applications, data flows and dependencies found before anything moves. - Landing zone: Accounts, networks, identity, guardrails and logging in place before the first workload. - Migration waves: Rehost, replatform or refactor decided per workload, and sequenced by risk. - Cutover: Staged cutovers behind validation gates, with rollback criteria agreed in advance. - Optimization: Right-sizing and commitments once workloads have settled. Where it sits: Strategy and migration shape the cloud architecture from its edges in: where your users and customers reach the estate, and the identity and policy foundation of the landing zone every workload moves into. Decisions to settle early: - Which workloads move. Not everything belongs in the cloud. Steady, latency-sensitive or recently refreshed workloads may stay; the business case shows which. - One provider or several. One provider is simpler; several reduce dependence and suit specific services. The decision follows your workloads, not a principle. - Rehost now or modernize first. Rehosting meets a deadline; modernizing captures more value. Many programs do the first and then the second. How the work runs: Assess, Current estate, cost and failure modes. Design, Target architecture and migration sequence. Migrate, Staged cutover behind validation gates. Optimize, Cost and performance tuned after the move. How it is bought: - A fixed-fee assessment: We discover applications and dependencies, review costs and contracts, and assess which workloads are worth moving. You receive a disposition view, a business case outline and a fixed price for the migration program. - A fixed-price build: The landing zone and each migration wave are priced before they start, covering cutover, validation and rollback for the workloads named. - Running it afterwards: After the move, workloads can be run by your team or by our managed cloud service, and an optimization review follows once usage settles. Worked example, a vmware renewal that forced the question. Say a regional bank faces a much higher virtualization renewal and a hardware refresh in the same year, and its board asks whether the cloud is the answer. Nobody holds a current map of which applications depend on which. - Discover: We discover applications and dependencies from the estate itself and confirm each with its owner, including the batch jobs that tie the core systems together. - Decide: Each workload is assessed to move, stay or be replaced, and the business case compares the options honestly, including those that stay on premises. - Prepare: A landing zone with identity, networking, logging and the regulator's residency requirements is built as code before any workload moves. - Migrate: Workloads move in waves ordered by risk, each cutover rehearsed, with rollback criteria agreed with the application owners. At the end, the bank runs each workload where it makes sense, can show its regulator where data lives, and has a landing zone ready for whatever moves next. (An illustration, not a client account.) What you have at the end: - Migration business case: The costs, risks and benefits of moving each workload, compared honestly with leaving it where it is. - Application and dependency inventory: Every application, its data, its dependencies and its owner, discovered from the estate itself. - Landing zone as infrastructure code: Accounts, networks, identity, guardrails and logging defined in code, ready before the first workload arrives. - Wave plan and cutover runbooks: Workloads grouped into waves by dependency and risk, each with cutover steps and rollback criteria. - Post-migration optimization report: Right-sizing and commitment recommendations drawn from the measured use of the migrated workloads. Standards and platforms worked with: AWS Well-Architected, Microsoft Cloud Adoption Framework, Google Cloud Architecture Framework, Terraform, AWS Application Migration Service, Azure Migrate, Kubernetes. Where it goes wrong, and what we design out: - Lifting everything as it is. Workloads moved without change often cost more in the cloud than before. Each workload gets its own disposition: move, change, replace or stay. - Moving before the foundation exists. Workloads that land before identity, networking and logging are in place get fixed afterwards. The landing zone comes first. - Ordering by convenience. Migrating the easiest systems first can strand dependencies. Waves follow dependencies and risk. What it changes: - Resilience with a recovery story. Zones, regions, backups and failover paths are designed around the recovery objectives your business can defend. - Repeatable change. Infrastructure is versioned, reviewed and reproducible, so delivery does not depend on a console session or one person's memory. - Cost that is explainable. Spend is connected to workloads and owners instead of arriving as a monthly surprise. How you will know it is working: - Each workload runs where the business case said it should. - Cutovers finish without using their rollback. - Cloud spend after migration matches the business case within its stated assumptions. - You can show a regulator where data lives after the move. Who you work with: - Cloud architect. Designs the target architecture, the landing zone and the migration sequence. - Migration engineers. Move workloads in waves, with validation and rollback for each cutover. - FinOps analyst. Builds the business case and checks the costs after the move. What we need from you: - Access to the current estate for discovery. - Application owners for each workload. - Contract and renewal dates for data centers, hardware and licences. - Your regulatory and residency requirements. Common questions: Q: Can you modernize an existing cloud environment rather than start over? A: Yes. We begin by mapping the current estate, its dependencies and its operational risks, then sequence improvements so critical workloads are not destabilized by the cleanup. Q: Can you migrate without a maintenance window? A: Often, and the answer depends on your data layer rather than your application. We design the cutover around what your stateful services can tolerate, stage it behind validation gates and agree explicit rollback criteria before a date is committed. Q: Do you hand over infrastructure we can run ourselves? A: Yes. Infrastructure is delivered as code in your repository, with runbooks and a knowledge transfer session. If you later want us to operate it, that is a separate managed service, not a dependency designed into the build. Q: What if our team disagrees with the architecture you propose? A: The findings state trade-offs rather than resolving them quietly, so the disagreement happens over evidence. We have changed recommendations on that basis, and a client decision to go a different way is a legitimate outcome. Q: Should we rehost, replatform or refactor? A: It is decided for each workload. Rehosting moves an application as it is and is quickest; replatforming moves its runtime or database to a managed service; refactoring changes the application itself. Most estates use all three, and the choice follows the value of each application and how long it has left to run. Q: What is a landing zone? A: The foundation of a cloud environment: account structure, networking, identity, security guardrails, logging and cost controls, set up before workloads arrive. Building it first means every workload lands somewhere already secure and governed, rather than being fixed afterwards. Q: How do you handle databases during migration? A: With replication from the old database to the new one while the application keeps running, so the final cutover is short and the data is already validated. The method depends on the database engine and how much change it can tolerate, and it is rehearsed before the real cutover. Q: Which cloud provider should we choose? A: The one whose services, regions, contract terms and skills market fit your workloads, and sometimes more than one. We work across AWS, Azure and Google Cloud and compare them on your requirements, including where your data must live and what your team already knows. Often paired with: Managed AWS, Azure and Google Cloud, Cloud cost management (FinOps), Data center migration and relocation. --- Canonical page: https://www.expandware.com/services/cloud/cloud-strategy-and-migration/ Site index for machines: https://www.expandware.com/llms.txt Full site text: https://www.expandware.com/llms-full.txt Expandware Private Limited. Inquiries: solutions@expandware.com, +92 (333) 32 11011.