While cloud computing may have brought on huge productivity enhancements across a variety of industries, you cannot just plunge into the best cloud solutions available. The shifting of data and applications to the cloud is desirable and appears to be a bold move. This is because there are many key things which businesses must consider to make sure the transition is seamless and successful. If you can consider these important points before you actually dive into a new technology, you can avoid the pitfalls later.
The successful strategies for migrating applications to the cloud are founded on the 5Rs which Gartner had earlier outlined. Businesses will start deciding on ways to migrate an application only in the second stage of the migration process. This is the stage of Portfolio Discovery and Planning and, in this stage; they seek to determine what their environment contains, what their interdependencies are, which applications are simpler to migrate and which are more challenging and ways in which they will shift each application.
On the basis of this knowledge, the businesses are then able to chalk out a definite plan. This plan may be changed and tweaked as the process of migration continues. According to the plan, they decide how best to migrate each application and the order in which such migration will take place. Depending on the current licensing systems and architecture, migration complexity may change. Usually starting with an application which is on the spectrum’s low-complexity end is advisable. Such a migration is simpler to complete. Then you can move onto the more complex ones.
- The first strategy for migrating applications is rehosting which is also popularly called “lift-and-shift”. Many cloud hosting projects are seen to move towards net new development using the cloud-native approach, but when businesses try to perform the migration faster most applications get re-hosted. Such rehosting can be accomplished using tools while some clients even prefer doing this manually. Incidentally, it has been noticed that it is easier to re-architect applications if they are already running in clouds. this may be because the business already has skills to optimize it or because the tough task of migrating the application and data has already been accomplished.
- Replatforming also popularly called “lift-tinker-and-shift” is another strategy for successfully migrating an application to the cloud. You may have to make some optimizations to get benefits but you will not need to alter the core architecture of applications. You can try to cut down on the time needed for handling database instances by shifting to Amazon RDS or a Database-as-a-Service platform, or by shifting applications to a platform like Amazon Elastic Beanstalk that is fully managed.
- Repurchasing refers to shifting to a different product; for instance, shifting a CRM to Salesforce or a Content Management System to Drupal etc.
- The fourth key step is that of re-architecting or refactoring where how the application was structured and created is re-imagined using cloud-native strategy. This is usually driven when there is a very powerful urge on part of businesses to scale their features and add new features which would perhaps be hard to deploy in the existing environment. While the migration from monolithic setup to server-less architecture for improving business agility and continuity may be very costly, it can offer maximum benefits.
- Retire: When any given workload fails to offer any kind of business value and is not even needed for another workload, it is best to get rid of it or “retire” it. It has been seen that nearly 10% of any business IT portfolio does not remain useful and these can easily be turned off. This is beneficial because the savings help the business and direct team attention to resources which people will use. It also lessens the number of things you need to secure.
- Retaining is revisiting or not doing anything at least for now. When you are not yet prepared to prioritize any application which may have been recently upgraded you can retain it. You may also not be interested in migrating certain applications. In other words, you must only migrate those applications which will help your business.
The whole process of cloud migration can be rather overwhelming. Businesses must have an in-depth understanding of their on-site infrastructure and also the best options which the cloud can offer. When you attempt a migration manually it is usually impracticable and if you depend on outdated information, you can miss out on key information during evaluations. By dealing with the right questions and thorough analysis of the right data, companies should be able to complete aws cloud migration smoothly. Selecting the best application migration option involves a decision which cannot be taken in isolation. Any such decision is basically an infrastructure modernization decision. So, it must be approached in a much wider context of application portfolio management. The decision is not really so much a decision on migration; it is more of a decision on optimization. In short, businesses have to see which migration techniques and cloud platforms can optimize an application’s contributions towards IT goals.