What type of server is most commonly used in deployments?

Rack servers are the most commonly used type of server in deployments due to their efficiency and scalability. They are designed to fit into standardized racks, allowing for optimal space utilization in data centers. This form factor enables organizations to maximize the amount of processing power they can house within a given physical area, which is particularly important as data storage and computing needs continue to grow.

Rack servers typically offer the ability to be stacked vertically, which facilitates better airflow and cooling compared to other server types. This design choice is essential as it helps maintain performance and reliability, reducing the risk of overheating during operation. Additionally, the modular nature of rack servers means that they can be easily added or removed as business needs change, allowing for flexibility and quick deployment.

In contrast, while blade servers and composable infrastructure may offer specific advantages in particular environments, they are not as broadly adopted for general use cases. Blade servers require a chassis for hosting, which can add complexity and cost, and composable systems typically target specific datacenter needs. Tower servers, while suitable for small businesses or edge deployments, do not offer the same level of scalability and efficiency as rack servers in larger datacenter environments. Thus, rack servers remain a preferred choice for a wide range of deployment scenarios.