How can applications be scaled to handle increasing request volumes?

To scale applications handling increasing request volumes, several approaches are used:

• Horizontal scaling — adding new instances of the application (e.g., running multiple copies of the service behind a load balancer).
• Vertical scaling — increasing resources of a single server (CPU, memory).
• Using message queues to unload peak loads and enable asynchronous processing.
• Caching frequently requested data (e.g., via Redis or built-in cache).
• Code and algorithm optimization to reduce processing time per request.
• Load partitioning (sharding) and microservices architecture.

In Go, goroutines can be used effectively for parallel request processing, as well as load balancing and monitoring tools. For example, running multiple instances of a service behind Nginx or Traefik.