Key things to mind while migrating to Cloud driven models

GUPTA, Gagan       Posted by GUPTA, Gagan
      Published: September 30, 2021

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Cloud is the new way to Computing. Most often, "cloud migration" describes the move from on-premises or legacy infrastructure to the cloud. However, the term can also apply to a migration from one cloud to another cloud. Cloud migration is not only a technical change it also requires the strong leadership support.

Fundamentals to cloud migration success are: Get stake holders and senior leaders aligned, set measurable top down goals that enables your company to transform and modernize, train your team that enables them to operate on the cloud. You are good to go !

Challenges most cloud migration project faces

My experience with multiple migration projects tells me that choosing the right migration strategy is never an easy task. Migrating to cloud provides operational agility and flexibility by automatically scaling capacity as per the demand and allowing teams to collaborate around the globe. Ensuring a smooth cloud transition can be a challenge to the best of the teams. It may entail taking servers off-line and cause applications outages which can hinder performance if not supported by backups.

Data is the most vulnerable during migration and might become unavailable or be at risk of breach. Security is the number one barrier that prevents businesses from adopting the cloud, and for good reason. Companies must take extreme precautions to minimize breach risk by applying cloud security features like encryption and access control.

New IP addresses, new roles, new access control, server consolidation or separation, existing applications may have difficulty communicating with newer cloud environments, and companies might have to adapt their processes to their cloud provider. New way of computing is the key here, up-skill your department well in advance. Whenever you introduce a new technology to your business, you need to ensure that everyone who uses that technology is on board.

The worst thing you could possibly do when it comes to cloud migration is try to move everything onto the cloud at once. Breaking down your cloud migration into stages, is the ultimate key to success.

Almost all companies get the cost of migration wrong. Cloud migration is a highly complex, extensive and multi stage process. Each stage is associated with its own set of technicalities, risk, process uniqueness, various costs, security, challenges, up time and degree of automation already in place. Redesigning is the key component in Cloud Migration, most people get it too undervalued and fail to get the associated costs right. This becomes a sub project, and without the time, scope, and quality parameters, can fail too easily. Thus risking jeopardizing the entire cloud migration.

Compliance can be another challenge for some highly regulated industries like finance, health care, and government, some cloud platforms have specialized offerings to meet compliance requirements more easily. Companies are responsible for implementing the right solutions for their needs.

Moving individual workloads can be straightforward, but planning a large-scale migration requires extensive planning across the organization.

Not every application can move easily. Which do you keep, and which do you wreck and rebuild? Legacy applications are the most difficult to move to cloud. Not every process need to migrate to cloud or even worth migrating to cloud.

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Key things to mind while migrating to Cloud driven models
Key things to mind while migrating to Cloud driven models

The 5 R's of Cloud Migration

The 5R model of cloud migration is one of the most popular model to overcome the above challenges.

Gartner, a highly influential information technology research company, describes 5 options for organizations migrating to the cloud. These cloud migration strategies are commonly known as the "5 R's":

Rehost - Rehosting can be thought of as "the same thing, but on cloud servers". Companies that choose this strategy will select an IaaS provider and recreate their application architecture on that infrastructure. It is ideal for lage scale, legacy migrations where companies can move quickly to meet business objectives and get better RoI.

Refactor - Companies that choose to refactor will reuse already existing code and frameworks, but run their applications on a PaaS provider's platform - instead of on IaaS, as in rehosting.

Revise - This strategy involves partially rewriting or expanding the code base, then deploying it by either rehosting or refactoring. It is ideal for companies looking to move quickly to meet business objectives and get a quick RoI.

Rebuild - To "rebuild" means rewriting and re-architecting the application from the ground up on a PaaS provider's platform. This can be a labor intensive process, but it also enables developers to take advantage of modern features from PaaS vendors. This strategy is mainly implemented to migrate applications from a monolithic architecture to service oriented ( or serverless) architecture. It is the most expensive approach and shall be used by companies to make the future-ready.

Replace - Businesses can also opt to discard their old applications altogether and switch to already-built SaaS (Software-as-a-Service) applications from third-party vendors. The most common example being moving to SaaS CRM or CMS or Cloud based workspace. This is a tactical approach for businesses to the best possible offering for a requirement but might be time consuming.

In addition to these 5 R's, there is one more R's that is worth mentioning. Retain - this approach is utilized by businesses whose applications will need major refactoring before migrating to the cloud but cannot do so because of some constraints. These constraints may be in the form of regulatory compliance applicable to them, mandating the application and data be stored on-premise to protect sensitive information. Example can be clinical research data.

Cloud migration can prove to be a very challenging and high risk endeavor for business. The leadership should conduct thorough due diligence of their application portfolio and environment to chart an optimal cloud migration strategy.

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Cloud migration checklist

To ease your transition to the cloud, prepare a checklist that helps keep the project on track by checking off each task as completed. A checklist can be as basic or exhaustive as project managers choose to make it. The following are some items to include:

- Determine which workloads will be relocated to the cloud and classify them by complexity, size, and production/not production.
- Research and select a cloud provider suitable to the workloads being relocated.
- Determine if you will need a multicloud approach based on your workloads.
- Perform a cost assessment for the migration.
- Assign a team to execute the migration.
- Communicate the goals of the migration to the team.
- Determine how much of the migration will be handled internally and by the cloud provider.
- Prioritize which workloads to migrate first.
- Prepare a plan outlining the roadmap and schedule for the migration.
- Ascertain whether the organization already uses any cloud-based applications and whether they should remain as they are or be replaced by new cloud-based services.
- Communicate to all stakeholders what to expect during and post-migration.
- Prepare a security plan for migration and post-migration.
- Establish KPIs for the migration.
- Check in with implementers along the way to review progress.
- Test, review, and make adjustments as needed.


The business landscape is changing; technology is changing faster. Many organizations now have remote workers, multiple offices, and numerous computing tools and platforms.

Moving to the cloud is not a challenge but an opportunity to make existing business processes more innovative and agile. As an initial step, you must check your business processes and all the infrastructure components available at your end. And then build a strategy that comprises all the requirements of your business organization on your cloud migration journey.

Cloud migration is a big, complex initiative for any company. While this initiative brings many unique challenges, those challenges are not insurmountable. The key is to recognize those potential risks and obstacles in the beginning and create a plan to manage them. With careful planning and evaluation, you can navigate the complexities of the cloud and reap the benefits of cloud-based IT operations.

Vyom Data Sciences can help you build and accomplish the cloud migration strategy or approach that suits your business requirements and your company's objectives. If you want to see how we can help you migrate to the cloud, schedule an appointment with one of our cloud consultants today.

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Key things to mind while migrating to Cloud driven models

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