What Is Hybrid Cloud Computing?

Hybrid cloud computing has become an increasingly popular model for enterprises looking to optimize their IT infrastructure and workloads. By combining public cloud, private cloud, and on-premises resources, companies can enjoy the best of all worlds – increased scalability, flexibility, security and cost-efficiency.

In this comprehensive guide, we‘ll explore what hybrid cloud is, how it works, its key benefits, use cases, and more. Let‘s dive in!

What is Hybrid Cloud Computing?

Hybrid cloud is a cloud computing model that uses a mix of on-premises infrastructure, private cloud services, and public cloud services. With a hybrid approach, sensitive data and mission-critical applications can be kept in highly secure private clouds or on-prem data centers. At the same time, non-sensitive operations like development, testing, and disaster recovery can leverage the economical public cloud.

In my opinion as a cloud infrastructure expert, the key characteristics that define a true hybrid cloud architecture are:

• Combines private, public and on-premises cloud platforms into an integrated environment
• Workloads and data can move seamlessly between platforms through orchestration
• Consistent security, networking, monitoring across platforms
• Flexible scaling up or down based on demand
• Self-service provisioning of resources

Unlike a public or private cloud deployment, hybrid cloud gives businesses far greater flexibility and more deployment options. You only pay for the resources you need, while maintaining control, security and compliance over sensitive data and workloads.

According to Flexera‘s 2021 State of the Cloud report, over 90% of enterprises now have a hybrid cloud strategy, highlighting the growing dominance of this model.

How Does Hybrid Cloud Work?

Hybrid cloud connects infrastructure and services between public clouds, private clouds and on-premises data centers through seamless orchestration between platforms. This is accomplished using technologies like:

• Virtualization – Hypervisors like VMware, Hyper-V, Xen and KVM allow workloads to move between environments by virtualizing compute, storage and networking.

• Containerization – Container platforms like Docker, Kubernetes and OpenShift package applications with their runtime dependencies so they can easily run across hybrid environments.

• Orchestration – Platforms like VMware Tanzu, RedHat OpenShift, Azure Stack, AWS Outposts provide automated deployment, management and movement of workloads between platforms.

• Cloud Bursting – Hybrid cloud enables temporary scalability by allowing on-premises workloads to “burst” out dynamically to the public cloud when needed.

• Disaster Recovery – Workloads can failover to the public cloud automatically in case of outages in private cloud or data center environments.

• Data Integration – Tools like Informatica, Talend, Azure Data Factory allow bi-directional data replication and movement between on-prem and cloud.

• Identity Management – Federated identity solutions like Active Directory Federation Services (ADFS) provide single sign-on across hybrid environments.

In my experience, these key capabilities are what make hybrid cloud environments flexible, resilient and powerful for enterprise IT. You get the control of private infrastructure combined with the scalability and innovations of public cloud.

Hybrid Cloud Use Cases

Here are some examples of how real companies are using hybrid cloud to transform their IT environments:

• Financial services company maintaining on-prem mainframes for core banking apps while shifting analytics and customer-facing web apps to the cloud.

• Healthcare provider keeping sensitive patient records in a private cloud while moving imaging archives and AI workloads to low-cost cloud object storage and compute.

• Retailer leveraging cloud bursting to easily handle 4X increases in holiday shopping traffic by expanding web servers temporarily into the public cloud.

• Software company keeping real-time supply chain management apps on-prem for low latency while putting QA, development and log analytics in the cloud.

• Industrial manufacturer keeping IoT, plant floor automation on-prem while placing sensor data lakes, analytics and training simulation workloads in the cloud.

As you can see, hybrid cloud is extremely versatile in meeting diverse enterprise requirements.

Benefits of Hybrid Cloud

Based on my consulting experience across many industries, here are the main benefits driving hybrid cloud adoption:

Cost Optimization (up to 30% savings)

Hybrid enables a "best fit" deployment model placing workloads optimally between private and public cloud platforms to substantially reduce costs over a solely on-premises IT approach. IDC estimates hybrid cloud reduces total cost of ownership over on-prem by 27-30% on average.

Security and Compliance

For many regulated industries like healthcare, finance and government, keeping sensitive data on-premises or private cloud is required to meet data residency, privacy and compliance regulations. Hybrid cloud provides these organizations choice and control over where data resides.

Flexibility and Scalability

The public cloud portion of a hybrid environment provides immense flexibility to scale resources up or down based on demand. This cloud bursting capability handles usage spikes seamlessly by expanding into the public cloud when needed.

Business Agility (80% faster app deployment)

Hybrid cloud accelerates time-to-market by providing options to rapidly develop and deploy modern cloud-native apps in the public cloud while maintaining legacy systems on-premises. IDC found hybrid cloud customers deploy new applications 80% faster on average.

Disaster Recovery (less than 2 hr RTO)

Since workloads can be replicated across environments, hybrid cloud enables robust disaster recovery while meeting aggressive RTO and RPO targets. Typical recovery time objective (RTO) for hybrid DR is under 2 hours.

Centralized Management

Hybrid platforms provide a single pane of glass to manage and monitor infrastructure, policies, configurations, costs and workload placement across on-prem and multiple clouds. This simplifies operations and improves visibility.

In summary, hybrid cloud delivers the best combination of control, security, cost and agility for enterprise IT in many use cases.

Comparing Private vs. Public vs. Hybrid Cloud

	Private Cloud	Public Cloud	Hybrid Cloud
Location	On-premises data centers	Shared multi-tenant public data centers	Mix of on-prem + public cloud
Security	Highly secure, isolated	Moderate (shared security model)	Keep sensitive data on private cloud
Compliance	Met easily	Varies, public cloud may not meet requirements	Compliant data stays on private cloud
Cost	High capex	Low variable costs (pay-as-you-go)	Optimal balance of private and public cloud cost models
Scalability	Limited, fixed capacity	Virtually unlimited on-demand	Burst to public cloud for temporary capacity
Agility	Low, requires capacity planning	Rapid innovation cycles	Develop fast on public cloud while maintaining legacy on-prem
Control	Full administrative control	Limited control over public cloud provider	Full control over private resources

As shown above, hybrid combines the best capabilities of private and public cloud models to suit enterprise needs.

Common Hybrid Cloud Use Cases

Based on my experience, here are the most common scenarios where hybrid cloud makes sense:

Data Residency and Compliance

Highly regulated industries like financial services, healthcare and the public sector often have data residency, privacy or regulatory requirements that mandate keeping sensitive data on-premises. Hybrid cloud allows these organizations to maintain compliant data on-prem while leveraging public cloud for non-sensitive workloads.

Mainframe Modernization

Many large enterprises rely on mainframe computers for mission-critical legacy applications that are difficult to replace or modernize. A hybrid approach maintains these workloads on-premises while offloading batch processing, analytics and web applications to the cloud.

Cloud Bursting

Applications that experience significant spikes in traffic can “cloud burst” on-demand to leverage the public cloud’s temporary resource capacity, avoiding over-provisioning expensive on-prem resources.

Disaster Recovery

Hybrid cloud enables disaster recovery architectures where on-premises workloads can failover to the public cloud when disruptions like natural disasters or power outages affect local data centers.

Development and Testing

Public cloud infrastructure provides an ideal platform for DevTest environments by delivering quick iteration without affecting production systems.

Digital Transformations

Many enterprises are digitally transforming legacy processes and applications. A hybrid approach keeps existing systems on-prem while shifting new services and apps to the cloud.

Mergers and Acquisitions

Following a merger, hybrid cloud allows newly merged entities to maintain legacy IT systems while harmonizing processes on new cloud-based platforms.

The optimal hybrid architecture will align closely to an organization‘s existing infrastructure, applications portfolio and business objectives.

Should You Choose Hybrid Cloud?

So how do you know if hybrid cloud is the right choice for your organization? Here are some key factors to consider:

Existing Infrastructure Investments – If you have significant capital invested in on-premises data centers and private cloud, hybrid lets you amortize those costs while still gaining public cloud benefits.

Security and Compliance Requirements – Highly regulated industries often have compliance, data privacy and data residency needs best met by keeping sensitive data on controlled private infrastructure.

Application Portfolio – Apps that cannot be refactored for the cloud (e.g. mainframe) can stay on-premises to protect legacy investments. New apps can be cloud-native.

Skill Gaps – If your IT team lacks deep public cloud skills, hybrid allows slowly ramping usage while learning – less disruptive than a full cloud transition.

Budget Unpredictability – Hybrid provides flexible options to scale up and down spend as budgets change rather than overspending on unused public cloud capacity.

Existing Multi-Cloud Use – If you already use multiple public clouds, hybrid integrates them cohesively to reduce complexity and manage costs.

Ultimately there is no one-size-fits-all model – the best cloud strategy depends on your existing IT landscape, skills, applications, security needs and business goals. For many large, regulated enterprises, hybrid serves as the ideal evolutionary path.

The Future of Hybrid Cloud

Looking ahead, I see a few key developments that will shape hybrid cloud adoption:

• Kubernetes domination – As Kubernetes becomes the de facto orchestration engine spanning public cloud and on-prem infrastructure, it will simplify hybrid management.

• Rise of hybrid PaaS – Platforms like RedHat OpenShift and VMware Tanzu that abstract away infrastructure complexity will accelerate hybrid cloud adoption.

• Multi-cloud interoperability – Open standards will reduce vendor lock-in and enhance interoperability between public cloud platforms to improve hybrid portability.

• Edge computing integration – Hybrid will integrate intelligent edge computing capabilities to boost performance, reduce latency, and enable new IoT use cases.

• Automation and AI Ops – Machine learning and analytics will provide self-optimizing and self-healing operations across complex hybrid environments.

As hybrid cloud platforms mature, enterprises gain a seamless model to innovate while optimizing existing IT investments. Though it brings some management complexity, improving skills and technologies help IT teams master the hybrid model.

Conclusion

Hybrid cloud architectures enable enterprises to optimize workload placement across on-premises data centers, private cloud and public cloud platforms based on costs, security and capabilities. By combining the best of each environment, hybrid cloud allows companies to improve agility, efficiency, resilience and compliance.

With orchestration between platforms, workloads easily move between private and public clouds to deliver scalability and innovation. At the same time, sensitive data remains hosted on controlled private infrastructure as needed to meet compliance mandates.

As hybrid technologies and skill sets advance, enterprises gain a flexible, future-proofed model to accelerate modernization while maximizing existing IT assets. Though hybrid cloud introduces some complexity, for many organizations it serves as the ideal transitional approach to compete and thrive in the digital era.