Cloud migration is the term given to the process of moving digital to a cloud infrastructure. Most noteworthy, the cloud refers to a pool of computer services accessed over the internet. This pool is accessible on-demand and self-service, providing instantaneous access to services without setup.
The cloud is sometimes used interchangeably with the term “internet,” but, technically, the cloud isn’t the internet. Rather, the cloud uses the internet to deliver resources.
The reasons businesses migrate to the cloud are numerous and diverse. But one big reason is that working in the cloud gives you access to virtually limitless computer resources.
What are the types of clouds?
- Public cloud: With a public cloud, services are owned and run by a third-party vendor over the public internet. These services can be free or available as pay-per-use to anyone who wishes to use or buy them.
- Private cloud: With a private cloud, cloud resources are used and owned solely by one organization. The private cloud may be located in a data center on-site or hosted by a provider in a remote location.
- Hybrid cloud: Hybrid cloud combines elements of private and public cloud and allows resources to move between the two. Hybrid cloud works well for organizations that need an element of a private cloud but still want access to the public cloud and its big benefits.
- Multicloud: Multicloud is the use of multiple cloud services in a single environment. This can mean reducing reliance on a single provider or realizing the benefits of more than one provider.
What are the cloud service models?
They’re three different kinds of cloud service models, cloud service categories, or the types of cloud computing:
- SaaS: Software as a Service, or SaaS, is software provided over the internet. Nothing is installed on a local computer, tablet, or phone.
- PaaS: PaaS, or Platform as a Service, is a software building ground for developers. PaaS provides a blank slate in the cloud that lets the developers create, deploy, and scale applications without having to sweat things like infrastructure, storage, or operating systems.
- IaaS: Infrastructure as a Service, or IaaS, means moving infrastructure into the cloud. Your cloud provider owns the hardware and is responsible for managing and maintaining it, so you do not have to worry about any maintenance.
What are the benefits of the cloud?
At a basic level, the benefits of the cloud are often around efficiency, achieving the maximum results with minimal expense. Here are seven big benefits of migrating to the cloud.
- Elasticity and scalability
- Cost savings and effectiveness
- Move from CapEx to OpEx
- Agility and Flexibility
- Performance, Reliability, and Resiliency
- Less Maintenance and Simplification of IT
What is the cloud migration process?
Here some steps to include on your cloud migration checklist.
- Evaluate the “why”: It is important for leadership to be clear on the purpose of the migration and set aggressive goals to drive the organization forward.
- Plan for what’s moving and how: Take stock of what’s in your environment, noting any interdependencies, then figure out what you’ll migrate first and how you’ll migrate it.
- Migrate applications and data: Applications should be composed, transferred, and authenticated using one of the migration strategies.
- Modernize and move ahead: As you migrate applications, keep hammering away to figure out your new operating model, turn off those legacy systems, and keep pushing forward.
What are the types of cloud migration strategies?
There are three basic types or patterns of cloud migration. In the order below, they run from easiest and fastest to more difficult.
- Lift-and-Shift (Rehosting): It is quick and requires minimal refactoring. The only downsides of lift-and-shift are that you can miss out on benefits if go the cloud-native way.
- Move-and-Improve (Replatforming): The move-and-improve approach to migration includes performing some modern updates to your application without throwing the whole thing out.
- Rip-and-Replace (Refactoring): This approach means rebuilding your workload from scratch to be “cloud-native.” It takes an investment in time and skills, but it pays out with the maximum benefits available in the cloud.
What are the challenges of cloud migration?
Some common cloud migration challenges are:
- Managing costs: Cloud can deliver cost savings, but determining the cost of the cloud can be tricky. Cloud expenses can be easy to underestimate.
- Complexity: Public cloud is generally easier to manage, but it can get complex.
- Dependencies: Application dependencies get complicated real quick and bring migrations to a screeching halt.
- Legacy applications: Evaluating why you are moving what you are moving becomes crucial. Decide what you’ll keep as-is, what needs to be rebuilt, and what might be worth repurchasing.
- Databases: Getting massive amounts of data to the cloud can take time.
- Stakeholder support: You want leadership committed to the long game when it comes to the cloud.
- Building cloud fluency: Cloud fluency ensures your entire organization is on the same page, so you do not have a small pool of cloud pros overburdened as cloud translators.