Clouds are a vast pool of usable and manageable virtualized means such as development platforms, hardware and services. These assets can be animatedly reconfigured to adjust to a flexible load, which helps in the optimal utilization of resources. Your enterprise breathes through IT—to keep your business moving forward, you must modernize and be more flexible to break the shackles of the orthodox technologies that are holding you back.
The cloud’s pay-as-you-go business model enables enterprises to cut capital spending by leveraging the cloud service. It also offers several benefits required by the enterprise, including lower operating cost, no upfront investment, great scalability and much more.
To gain the benefit of cloud computing and guard the current investment to the legacy system, companies are keen in migrating their legacy systems to the cloud. The cloud provides a cost-effective corridor to transforming legacy systems to more modern technologies. It offers modern efficient development structures, improved supervision of IT resource supply and demand and enhanced scalability, and it provides access to these assets from almost any part of the world. With this upgraded dexterity, you are able to respond more swiftly to the changes in the market, exploit newer business prospects, surge financial growth and drive innovation.
However, to benefit from what the cloud could offer, you are required to spend money and time on launching your cloud and migrating data and applications to the newer environment.
Migrating databases from on-premise machines to the cloud has a few crucial advantages: Cloud elasticity delivers instant flexibility in scaling up or down. And, the cloud model saves money by shifting companies from early heavy capital expenses (CapEx) of on-premise hardware to constant, known operational expenses (OpEx) on cloud facilities and more.
But migrating live applications to the cloud is not an easy task. Listed below are few methods to migrate to the cloud.
Rehost: This term refers to redistributing applications to a diverse hardware setting and changing the application’s structure configuration. Rehosting the application while making no changes to its construction can offer a faster migration to the cloud. The key benefit of infrastructure as a service (IaaS) is that the systems can be migrated by the teams quickly, with no modification to their architecture.
Refactor: This term refers to applications run over the cloud provider’s infrastructure. The main benefit is combining innovation with awareness, as “backward-compatible” platform as a service (PaaS) means developers can reuse frameworks, languages and containers in which they have invested. Its biggest drawbacks include transitive risk, missing capabilities and lock-in framework.
Revise: This method requires extending or modifying the present code base to assist the legacy transformation requirements, and then using the refactor or rehost options to position the cloud. This method enables enterprises to enhance the application to influence the cloud features of providers’ infrastructure. However, this method requires upfront development work, which needs upfront outlays to assemble a development team.
Rebuild: This term refers to rebuilding the solution on PaaS, discarding code for the current application and restructuring the application. Though rebuilding involves dropping the familiarity of present code and frameworks, the benefit of rebuilding the application is admission to advanced and innovative features in the platform of the provider. They increase the productivity of the developer. Still, lock-in is a major drawback: Should the provider make a pricing or technical change, breaches the service level agreements or goes out of business, the customer is required to switch, possibly deserting some or almost all its application resources.
Replace: This method requires discarding the present application and using the commercial software offered as a service. This method reduces or eliminates any investment in assembling a development team when there is a change in the business function. Issues may include issues in accessing the data, unpredictable data semantics and vendor lock-in.
The Bottom Line
Projects relating the migration be of any size entails careful planning. Evaluating its existing applications portfolio could help an organization understand the complexity, challenges and amount of effort required in migrating its databases to the cloud. Many tools assist application and database migrations, and each method differs in the amount of automation they provide and in the accurateness of the migrated system. Carrying out proofs of concept using these tools to understand their abilities will be constructive in the longer run for larger projects related to migration.