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Traditional Infrastructure
In a traditional architecture design, IT components typically exist on-premises and in silos. The company purchases most IT equipment and software, relying primarily on an in-house team to keep the engines running. Different locations may have different IT teams heading them, and systems across business units, offices, and regions exist in silos. You will find this type of IT infrastructure architecture in small-to-mid-sized, non-digital native organizations.
Converged Architecture
This type of IT infrastructure architecture seeks to address the fragmentation found in traditional infrastructure. It groups related IT components into a single, optimized hub and sets up connected workflows for centralized visibility. Available resources are grouped into “resource pools” shared by different applications and processes depending on priority and business policies. The cloud has further enabled converged IT infrastructure architectures, making it easier to consolidate, centralize, and disburse resources.
Hyper-converged infrastructure
Like a converged IT infrastructure architecture, hyper-converged infrastructure breaks down silos and enables centralized management – but it uses software components hosted on a hypervisor to achieve this. Its key components include software-defined storage, software-defined networking, and, of course, the hypervisor, enabling resource federation across processes. This type of IT infrastructure architecture usually operates using commercial off-the-shelf (COTS) servers.
Infrastructure as a service (IaaS)
Valued at just $31.61 Billion in 2019, IaaS is expected to cross $202 billion by 2027, in line with the trend of moving away from hardware-heavy IT infrastructure architectures. IaaS uses online services to replace physical computing resources and components, running either on a public cloud or private hypervisors/virtual machines. It is similar to hyper-converged infrastructures, but the IT services are provided and maintained entirely by a third party as per an aaS, subscription-based licensing model.
Infrastructure as Code
This is a specific IT infrastructure management approach that lets you maintain and maneuver the architecture using software applications or lines of code instead of physical hardware configurations or UI settings. Infrastructure as a code applies to both hardware and software IT components, with strategically deployed code helping to monitor processes, provision resources, enforce security, and perform other activities.
Cloud-Based Architecture
The cloud is rapidly becoming the default environment for hosting IT infrastructure components, with the option of migrating fully to a public cloud, dividing processes between on-premise and cloud environments, having your own private cloud, or implementing managed cloud services. Today, most organizations choose the hybrid cloud route, where there is a mix of on-premise and cloud resources and the co-existence of private and multiple cloud vendors.