How to Go About Migrating to the Cloud

cloud storage illustration

Digital transformation has become the new normal after the COVID-19 pandemic, irrespective of whether it is a business-to-business, business-to-customer or business-to-employee solution. Innovation is the need of the hour. Business execution needs innovation to move things forward digitally, and cloud services are a catalyst for this transformation. Here is a primer on how to migrate your organisation’s services to the cloud.

By making their services available to enterprises, Cloud Service Providers (CSPs) have brought about a remarkable change in the approach to IT infrastructure needs and solutions. Cloud services are available for all technical needs, ranging from Big Data and IoT, to mobile, analytics and AI/ML. Be it a startup or a large enterprise, CSPs have offerings and services for all.

In this journey of digital transformation, a cloud strategy is an enabler and may be initiated through many queries, such as:

  • How to identify the right CSP to meet the technical and business needs of an enterprise?
  • Will platform/vendor lock-in be enforced if we go with one CSP?
  • Will there be an adequate level of security and compliance enforcement?
  • What will be the cost in the short/long-term and the ROI?
  • What will be the payback period for costs incurred?
  • What are the maintenance and support requirements?
  • Will we lose control of the system after migrating to the cloud?
  • What are the required skillsets for cloud based solutions and IT infrastructure?

Which is better – engaging directly with CSPs, or using some cloud service aggregator or broker for providing the solutions?

Additionally, there can be queries on technical perspectives, such as:

  • What are the cloud services that can be fitted to the solutions needed?
  • Will a service of one CSP support similar services of another CSP?
  • Which is preferred – public, private, hybrid or multi-cloud infrastructure?
  • How to utilise cloud services such as PaaS, IaaS or SaaS?

There can be many such other questions while moving towards cloud based infrastructure or solutions.

Cloud enablement challenges
An enterprise could face various challenges during cloud migration, even though it is aligned for migrating to cloud services. These ground level challenges can be the parameters for defining the success factor of its cloud enablement strategies. The following are some of the challenges faced by an enterprise during cloud migration.

  • Adaption by people: For any enterprise, technology may not be the bottleneck; the highest level of challenges can come from people who take time to adapt to it.
  • Strategies and roadmap: Business objectives have to align with cloud strategies and define the roadmaps when moving forward. Stockholders’ consent is required to overcome the psychological bottlenecks in understanding cloud services. People can be reluctant to move to cloud services due to their perceptions of security, privacy and technology.
  • Existing technical encumbrances: These encumbrances should be identified, followed by the determination of a solution to make the move to cloud services. The legacy system should be analysed, and a plan for migration to the cloud formulated.
  • Training, maintenance and support: Training, maintenance and support play an important part in cloud migrations. It is imperative to educate all personnel about the system and the advantages of using it. Employees have to be trained with the required skillsets. Overall maintenance and support for the system is an ongoing process.
  • ROI and payback period: The cost associated with cloud migration should be identified and fall within the budget of an enterprise. It is important to estimate the ROI and payback period.
  • Technology stack: Migration towards the right set of technologies plays an important role. A lot is changing around the world from the perspective of technology, and it is important to keep a measure of the right set of cloud services and solutions with a focus on the enterprise, people and process capabilities to run for the long term.
  • Security and compliance: Security and compliance measures have to be identified and implemented with cloud solutions.
  • Downtime: There should be a near-to-zero downtime while migrating to cloud services. It should be at acceptable measures. Downtime can have a huge cost for any enterprise.
    Associated risk: Identification of proper risks before migration to the cloud is an important setup. There should be a proper mitigation plan for each of the identified risk areas. These risks can be technical, non-technical, operational, etc.
  • Time to market: Planning and identification of a cloud migration time frame, and mapping it with the ongoing enterprise business deliveries is challenging. This time frame is a significant contributor to decision making by enterprise stakeholders.
  • Monitoring and governance: Fear of lack of control after cloud migration can be a natural concern. An enterprise is required to have the required in-house skillset to have full control over cloud migration execution. Even the enterprise data must be kept under complete control even though it may move to a third party CSP.

Identification of the right set of strategies is the first and key step towards cloud enablement for an enterprise. Cloud enablement strategies should be mapped with enterprise business objectives and goals. It is important to measure the overall cloud enablement cost, and prepare the payback period and ROI details in the planning phase.

Figure 1: Services offered

Cloud transformation
Enterprise cloud enablement or transformation starts with the assessment of the existing system of the enterprise. This assessment is required to be done at various levels, as listed below.

Platform/Technology: Assessment of all duplicate/missing/legacy applications, tools or frameworks in the system. Assessment for repetitive manual work, systems or sub-systems to retire, etc.

Data: Assessment of data awareness gaps, data availability gaps, data analysis, etc. This is an important aspect to bring in the right value at the right time associated with the data in the system.

People and processes: Assessment of training requirements, management gaps, financial gaps, facilities gaps, process inefficiencies, information gaps, measurement gaps, compliance needs, security needs, etc.

The assessment of the different components of the enterprise will help to identify the existing cloud maturity level. Broadly, this can be categorised in three stages, as listed below.

Initial stage: This involves enterprise planning for cloud enablement and working on various cloud strategies. The enterprise may have one or some of its applications on the cloud. It either has the following available or is working on these aspects:

  • Cloud strategy and vision
  • Stakeholders’ alignment
  • Cloud enablement feasibility assessment
  • Cloud adoption roadmap
  • Training/workshops/sessions

Engaged stage: In this stage, all major offerings are based on cloud solutions, and enterprises have the following:

  • Enterprise policies for cloud enablement
  • Centre of excellence (cloud services/technologies)
  • End-to-end solutions on cloud
  • Round-the-clock services (governance, monitoring, management, security, compliance)

Optimised stage: In this stage, the enterprise has developed the core philosophy or strategy to go cloud-first for any of its infrastructure and technical needs. It has incorporated the following in the system:

  • Highest satisfaction for its customers
  • Cloud-first
  • Optimisations (performance/cost)
  • Research and development
  • Cloud-driven business innovations

The challenges and the solutions
However, the transformation to the cloud may encounter a few challenges, such as:

  • Lack of awareness, knowledge and confidence in cloud services capabilities
  • Limited budget and executive support for cloud adoption
  • Business-critical needs alignment with cloud adoption
  • Lack of direction for cloud adoption
  • Security and compliance establishment on the cloud
  • Availability of expert engineers/employees
  • TCO for cloud transformation
  • Optimisations for ongoing system monitoring, governance and maintenance
  • Regular audits to establish all required security standards and compliance
  • Dependency on single cloud providers
  • Innovative usage of cloud services
  • Expert cloud engineers in the staff

These challenges can be addressed by taking certain actions:

  • Conducting sessions, training and workshops for awareness, knowledge and capabilities of cloud services
  • Comparison of services of various cloud providers
  • Existing system assessment and audit
  • Business needs alignment with cloud adoption recommendations
  • Cloud adoption roadmap
  • Implementation of various POC and feasibility checks for cloud transformation
  • Referring to similar use cases, case studies and success stories
  • Functional and non-functional needs feasibility check on identified cloud services
  • Education of employees for cloud services and their usage
  • System monitoring and further optimisations
  • Complete cloud transformation roadmap and plan
  • Establishment of cloud centre of excellence
  • Security and compliance need assessment and recommendations
  • Available applications assessment for cloud transformation
  • Migration of applications to the cloud
  • Innovative applications and services implementation using cloud infra and services
  • Ongoing assessment of the latest cloud services for further optimisation on performance or cost

These action items can lead to outcomes like:

  • Cloud transformation strategies and roadmap
  • Confidence in cloud services capabilities
  • Business needs amalgamation for a solution on the cloud
  • Alignment with all stakeholders
  • Educated employees for cloud services management and maintenance
  • Cloud expert team
  • Best practices in place
  • Transformed people, processes and platforms
  • Well established security, compliance and governance processes
  • No dependency on single cloud providers
  • High level of security and compliance establishment
  • Well defined processes, policies and practices for cloud execution
  • Highest degree of customer satisfaction
Figure 2: Cloud computing models

Cloud computing service models
It is important to understand the available cloud computing service models while migrating to the cloud. There are three cloud computing models — PaaS, IaaS, and SaaS (Figure 1).

PaaS: This cloud computing model facilitates the entire environment, which includes storage, servers, networking, OS, etc. Users can have their applications and data built on these platforms. Some of the examples for PaaS are, Google App Engine, and Commerce Tools.

IaaS: This provides an automated and scalable environment with flexibility and control over the system. Some of the examples for IaaS are Amazon Web Services (AWS), Rackspace, Google Cloud Engine, Microsoft Azure, Flexiscale, etc.

SaaS: These are the applications available over the Internet. Users have less control over the customisation or tailoring of features. Some of the examples are Gmail, Google Doc, Citrix GoToMeeting, Cisco WebEx, etc.

Additionally, there are many other X-as-a-Service available like DaaS (Data-as-a-Service), SoaaS (Storage-as-a-Service), SeaaS (Security-as-a-Service), etc. Enterprise cloud solutions are generally a combination of all these service models.

Cloud deployment models
There are some input parameters for identifying the right cloud computing deployment forms like security needs, data management needs, and type of data. The different forms of cloud computing are shown in Figure 2.

Public cloud: These cloud services are for generic usages, and are hard to customise as per the organisation’s need. They work on a pay-per-use basis, and are available over the Internet for everyone. Infrastructure resides under the control of the public cloud service provider, and the customers don’t have any control over data storage location, customisation, etc. Some of the examples of public cloud services are E-mail, Google Docs, etc.

Private cloud: This cloud services setup is done as per the organisation’s need. It provides customisation and secure access along with scalability as the business grows.

Hybrid cloud: A hybrid cloud is an amalgamation of public or private cloud services and on- premise infrastructure. This provides an option to utilise best-of-breed services among those available from various CSPs. It requires an effective level of integration between the services, and enforcement of the required security and management.

Community cloud: This is a shared infrastructure specific to a community. It is a multi-tenant shared common platform between communities of similar needs, concerns, security, compliance, etc. Government departments, universities, and central banks are some of the examples of community cloud users.

Evaluation parameters of solutions
Figure 3 gives the parameters that need to be considered before opting for a cloud computing solution.

Figure 3: Parameters for consideration before choosing a cloud computing solution

Computing: The enterprise’s computing needs like managed instances, edge computing, serverless computing, etc.

Storage and database: The enterprise’s storage and database needs like structured and unstructured data, archival storage, data lake, etc.

Infrastructure and networking: The organisation’s infrastructure and networking needs like virtual network, gateways, VPN, etc.

Application services: The enterprise’s application services needs like analytics, development tools, integration tools, etc.

Management and governance: The enterprise’s management and governance needs like application monitoring and logs, infrastructure monitoring, usage reports, alter/notification, configurations, etc.

Security, identity and compliance: The enterprise’s security, identity and compliance needs like authentication, authorisation, role and privilege management, compliance enablement, security enforcement, etc.

These defined parameters consider various functional and non-functional aspects as well.

Non-functional aspects – Availability, recoverability, resilience, security, data integrity,
capacity, manageability, scalability, threat management, usability, performance, reliability, maintainability, interoperability, risk management, survivability, disaster recovery, regulatory, etc.

Functional aspects – Application features, transactions, administration, authentication, authorisation, tracking, external interfaces, compliance, reporting, certifications, historical data, governance, business rules, audit, legal or regulatory, etc.

Hybrid cloud and multi-cloud
No one size fits all cloud solutions, and single cloud providers can’t be everything for everyone. Multi-cloud and hybrid cloud are the two different architectural approaches for cloud solutions. In the multi-cloud model, infrastructure/services reside on more than one public cloud provider, while the hybrid cloud is an orchestration between on-premise (private cloud) systems and public cloud services.

The characteristics of a hybrid cloud include:

  • Centralised identity across multiple environments
  • Unified monitoring on resources
  • Persistent and secure connectivity between enterprise systems and cloud
  • Cloud cost reduction
  • Best-of-breed services utilisation from the public and private cloud
  • Empowerment to support IT innovation for POC and pilot programmes
  • Data life cycle management — backup and archiving

Examples of hybrid cloud solutions are:

  • Data storage at private cloud (on-premise) system for security and compliance, with the utilisation of public cloud services for other functions in the system
  • Legacy system at on-premise (private cloud) with the utilisation of public cloud services for additional features/applications

Some of the characteristics of multi-cloud are:

  • No lock-in to a single cloud provider; so low risk and freedom to choose the best
  • Best-of-breed services utilisation from different cloud providers
  • Workloads and users can be anywhere
  • Highly available resilient environment
  • Disaster recovery and maximum availability
  • Overcoming the monopoly of one platform

Examples of multi-cloud solutions include:

  • Machine learning training on one cloud provider for data enrichment, specifically if the data sources are public, results in integration with the other/primary cloud provider in the system
  • Disaster recovery implementation with multiple cloud providers
  • Data backup and archive life cycle management between primary and secondary public cloud providers
  • Identity and access management layer from one cloud provider for services getting utilised from multiple cloud providers
  • Utilisation of special (best-of-breed) services like video text content indexing, push notifications, etc, from other than a primary cloud provider

To sum up, each business is unique in the cloud transformation journey. Transformation works on mainly three functions:

  • Existing system
  • Accessible/available resources (time, budget, skills, etc)
  • Target system

Any enterprise needs to understand the required technical needs and business expectations before moving to cloud services. These services have some implicit advantages like:

  • Pay as per usage
  • Reliability, scalability and sustainability
  • Secure storage management
  • Wide range of technology services and solutions availability
  • Device and location independent
  • Easy and agile deployment with a high level of automation
  • 24×7 support

The technical needs and business objectives of an enterprise are the drivers for cloud services identification and their utilisation. It is also important to identify the appropriate cloud computing model—IaaS, SaaS or PaaS. Solution scalability, cost (both in the short term and long term), availability and recovery are some of the important aspects to consider while designing cloud based solutions.

Given below are some of the guidelines/best practices while opting for any cloud solution:

  • Minimise vendor lock-in
  • Optimise cloud resources and cost
  • Ensure seamless and optimal on-boarding of new flows

Theoretically, the characteristics or benefits of a multi-cloud look more promising than that of a hybrid cloud, though in practice a lot of challenges can come up during implementation, deployment and management of the former. The latter comes with the complexity of managing the system on different cloud providers, and each CSP has different services and ways of implementing/utilising these.


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