In a centralized server Video on Demand (VOD) architecture, how does server requirement compare to a distributed architecture?

In a centralized server Video on Demand (VOD) architecture, the design typically consolidates resources and services onto a single server or a small cluster of servers. This centralization allows for simplified management and potentially reduced installation and maintenance overhead. Since all requests for video content are directed to this central server, the overall server requirement tends to be lower in comparison to a distributed architecture, where multiple servers are needed to handle concurrent requests made by users across different geographical locations.

In a distributed architecture, the load is spread out across many servers which helps to enhance performance and availability. This means that during peak times, multiple servers can work concurrently to handle simultaneous streams from numerous users, which can lead to a higher total server requirement. The centralized architecture's efficiency in resource usage permits it to function with fewer servers to manage the same number of requests, especially in environments where peak concurrent viewership is manageable.

Thus, when comparing the two architectures, it is clear that a centralized VOD setup requires fewer servers to achieve similar functionality, making it the correct choice.