What does each application deployment in performance and production environments entail?

In performance and production environments, deploying applications typically requires two workers to ensure high availability and fault tolerance. This approach helps to distribute the load and provides redundancy, which is crucial for maintaining a robust system. When one worker experiences issues or goes down for maintenance, the other can handle the traffic seamlessly, minimizing downtime and ensuring that users experience continuous service.

Choosing to deploy to only a single worker would not provide the required failover capabilities or sufficient load balancing, which are essential in a production scenario where application availability is critical. Similarly, options focusing on multiple cloud regions or on-premise servers do not directly relate to the core requirement of having redundant processing capabilities within the same environment. Thus, having two workers is a standard practice that aligns with best practices for application deployment in performance-sensitive scenarios.