Heavy Duty Website Architecture

A reliable, high‑availability website requires a mix of good architecture, proactive monitoring, capacity planning, and fast incident response. Below is a practical, prioritized article that diagnoses the three specific symptoms you listed — not responding host, exhausted storage, and slow user response — and gives concrete prevention and remediation steps you can implement immediately and over time. There are several causes of the problems:

• Not responding host: usually caused by CPU/memory exhaustion, process crashes, network or OS limits, or overloaded firewall/NAT devices.
• Exhausted storage: caused by unbounded logs, backups, user uploads, database growth, or misconfigured retention.
• Slow response for users: caused by overloaded app servers, contention in databases, inefficient queries, cold caches, network latency, or blocking synchronous work.

High level strategy to solve these issues as follow: 

• Make outages observable and automated (monitoring + alerting + runbooks).
• Move from single points of failure to distributed, redundant components.
• Separate concerns: scale stateless web tier independently from stateful storage and background processing.
• Protect core services with graceful degradation and backpressure.

But you need to make sure that your organization already have: 

• Logging and monitoring system
• Implementation of load balancer 
• automatic backup and restore
• having availability sets 
• real sizing for the application 
• having incident response 

immediate Triage Steps (first 0–60 minutes)

• Run health checks
• Isolate the problem
• Free emergency space
• Apply short‑term rate limiting
• Communicate

last but not least we need to prepare the architecture and the system better

• Implement centralized monitoring and alerts for disk, CPU, memory, latency, and error rates.
• Move user uploads and logs to scalable object storage; enforce lifecycle and quotas.
• Make web tier stateless and enable autoscaling with health checks.
• Add a CDN for static assets and aggressive caching rules.
• Add request throttling/rate limiting and circuit breakers for heavy endpoints.
• Run profiling to eliminate top 10 slow queries and CPU hotspots.
• Create runbooks and hold incident response drills for the team.