When enterprises decide to migrate to the cloud, the lift-and-shift option usually appears to be the most expedient and painless way out. It is as easy as lifting and shifting. Lift your existing applications, data, and workloads out of the on-premises environment and shift it to the cloud in major code change, with zero disruption to the business, and minimal downtime.
On a broad face value, it seems to be a potent migration model, low work high pay. Yet, lurking under the surface is a set of latent expenses and inefficiencies and future constraints that many organizations can never consider before it is too late.
Of these softer concerns about lift-and-shift migrations, this article has discussed some of the less familiar disadvantages of such migrations, the dangers that can befall when such migration moves too fast, and how you can be smarter and more strategic than the best-known pitfalls.
Understanding Lift-and-Shift Model
Commonly referred to as rehosting, lift-and-shift is defined as the cloud migration of workloads that does not include any redesign element and adjustments to make to the current infrastructure. This is usually done to fast track adoption of the cloud, to have very short deadlines, or perhaps to cut down on the initial development costs.
Nonetheless, the model makes such an assumption that cloud infrastructure operates in the same similarity as to the traditional on-prem environments, which is never true. This leads to the fact that although the migration may be rapid, in the long term the benefit of staying at the cloud declines and the cost of operations may go out of control at any given moment.
How Speed Without Strategy Fails in the Cloud
A lot of companies are under pressure to migrate to the cloud, whether to meet executive targets, drive down data center expenses, or become part of some larger digital transformation program. But as much as these make sense, haste without strategy has a way of creating superficial victories and technical debt.
Devoid of comprehension of the disparities between cloud environments and the old fashioned infrastructure, organizations duplicate subpar designs and lose the real value of the cloud: scale, dependability, and computerization.
Somewhat, the same can turn out to be a lasting headache turned out to be intended as a quick win, with increasing expenses, overheads in management and little over in performance. What is the bottom line? An effective cloud migration is not only about the speed of migration, it is also about the reasons why, the methods and the objects.
The Hidden Costs Of A Quick Migration
Resource sizing is perhaps one of the most obvious problems of lift-and-shift migrations. Legacy applications would often be built on fixed-capacity physical servers, so are in general overprovisioned to cover peak demand. By replicating such workloads to the cloud without optimizing them, organizations end up paying far more than required and far more storage than what is required.
Cloud environments have elasticity to provide dynamic re-scaling in real-time according to demand, yet applications not refactored to use such elasticity consume a fixed amount of resources, often on the large side of the scale. This converts into more expensive monthly bills which could have been by any means avoided through a more precise migration strategy.
Surprise Licensing and Compliance Costs
The other side of cloud migration that is frequently forgotten is licensing. The on-prem enterprise or perpetual software licenses might need a different cloud licensing model. And in other cases, vendors will tack on a premium to when they are operating their products on cloud environments and this is more so on conditions that you are operating bring-your-own-license (BYOL) models which are not compatible with the terms of the cloud provider.
Also it is extremely possible that when not carefully reviewed, you can be deemed not in compliance with licensed agreements that you have and leave your business to audit, penalty or even mandatory renegotiations.
Performance Problems and In-Optimal Architecture
Apps that are designed to run in on-prem locations might not be efficient in the cloud. To take an example, reliance on legacy middleware, fixed IP addresses or monolithic structure can create latency and performance issues in distributed cloud systems.
Since lift-and-shift does not require the rearchitecting of applications to the cloud, these inefficiencies remain, and are regularly accentuated. Worse still, debugging performance problems nowadays is a complication in the cloud because of variation in service monitoring and maintenance.
Untransferred Security Vulnerabilities
By porting legacy-based workloads to the cloud without making changes, you in effect move your security vulnerabilities to the cloud. This consists of depreciated authentication schemes, plain-text links, non-safe stores, and lack of access controls.
The cloud environments follow the shared responsibility model, implying that one particular lifestyle implemented in terms of security may not provide enough protection in the cloud as it did on-prem. Lift-and-shift migrations may unexpectedly leave you more vulnerable unless you develop audits and reconfiguration.
Amplified Operational Overhead
Although the concept of lift-and-shift is straightforward, the practice tempted to result in operational woes. The teams are forced to deal with off-the-shelf applications in a cloud infrastructure, educate themselves on untested monitoring tools, and maintain back-end infrastructure that was not designed or optimized to run in a cloud environment.
Lift-and-shift does not reduce complexity, it can just transfer it elsewhere. Teams will have even less time to do firefighting and cost control by hand and attempt to bring systems to optimal operation after the fact- burdening your IT talent.
Whether your company is contemplating moving to the cloud or not, expediency alone must not be your main deciding factor. The long-term success depends on a well-reasoned, step-by-step strategy, which can be facilitated by a proper knowledge of what you need to bring to the cloud and how ready it is.
Begin with a Complete Evaluation
Evaluate your whole IT environment before you migrate. Determine what applications take priority, what is not utilized and which ones can be modernized. Not every workload is suitable in the cloud, and not everyone needs an identical migration approach.
Categorize tasks by the complexity, interdependencies, the compliance needs, and costing profiles. It shall assist you in drawing up a road map that is business value oriented and long term aligned.
Right-Size and Optimize
You cannot assume that configuration fits well in the cloud. Monitor the tools and assess the real use and performance indicators. On this information, tune your instance types, network setups and storage levels to suit your need at a better scale.
This game plan of proactive right-sizing is potentially quite a cost-effective solution in addition to enhanced performance as full refactor is not required.
Think of Hybrid Approach
Not all should be moved at a time. Part of the modernization may be suitable in some applications, e.g., only migration of databases to a managed cloud service and leaving the application stack on virtual machines.
Combining lift-and-shift with selective refactoring would also ensure fewer changes in the system, but it would deliver the benefits of cloud-native support where most needed.
Cost of Governance and FinOps
After entering the cloud, the control over cost should be a constant exercise. Introduce tags, budget reminders, and report all the details of the scenery spent on clouds across teams and projects. Encourage FinOps culture across their IT and financial professionals to support responsibility and efficiency.
Without visibility and discipline, cloud costs are easily allowed to spiral. By developing cost awareness into your culture now, you will avoid many unfriendly surprises.
Finally, What I learned: Be Fast But Not Inert
Lift-and-shift may be the speediest approach to getting into the cloud, however, unless you plan and strategize, it may become an expensive distraction. It is not only a matter of swiftness, but soundness, in the movement.
CloudLogically assists companies to think past migration checklists. We are consulting based on the long-term development of efficient cloud strategies targeted at maximum performance, cost controls, and risk minimization.
Have you been thinking about migrating to the cloud? Or have you already made the-off change and found you have unplanned expenses? We can assist.
So, we can help you get the most out of your move and how to gain maximum value from the cloud.
