ASP.NET Core Interview Question #228
How would you design an ASP.NET Core application for high traffic?
Senior ASP.NET Core Real-World Scenarios Senior Advanced
Quick Interview Answer
Keep request processing stateless where practical so multiple instances can serve traffic behind a load balancer. Use asynchronous I/O, efficient database queries, pagination, appropriate caching, connection pooling, response compression, and bounded outbound calls.
Detailed Explanation
Keep request processing stateless where practical so multiple instances can serve traffic behind a load balancer. Use asynchronous I/O, efficient database queries, pagination, appropriate caching, connection pooling, response compression, and bounded outbound calls.
Move expensive or non-interactive work to durable background processing when the user does not need to wait for it. Protect constrained resources with rate limiting, timeouts, concurrency controls, and backpressure.
Measure the system under realistic load and scale the actual bottleneck. High traffic is an architecture and operations problem as well as a code-performance problem.
Code Example
builder.Services.AddOutputCache();
builder.Services.AddResponseCompression();
builder.Services.AddRateLimiter(options => { /* policies */ });
builder.Services.AddHttpClient();
app.UseResponseCompression();
app.UseOutputCache();
app.UseRateLimiter();