Speed, stability and fault tolerance are critical parameters for online casinos. With high loads, traffic from different countries and constant gaming sessions, the platform should be ready to scale without interruption. This requires a well-thought-out server architecture, load balancing and flexible hosting.
Hosting: where to deploy online casinos
What is important to consider:- Speed and low ping by main geo
- DDoS and load protection
- Scalability by CPU/RAM/traffic
- Jurisdiction and loyalty to game projects
- Hetzner - productive and budget for EU/SNG
- DigitalOcean - flexibility, API, backups
- Vultr, Linode - Asia and South America
- AWS/GCP - maximum scalability and geo-coverage
- Using private servers + CDN (Cloudflare, Bunny)
Load balancing
Balancing is the distribution of incoming requests across multiple servers or containers to improve fault tolerance and performance.
What is balanced:- Backend API Requests
- Gaming sessions (including live games, crash, tournaments)
- WebApp and frontend load
- Traffic to game providers and payments
- NGINX/HAProxy as balancer
- Cloud Load Balancer (AWS, GCP)
- Docker Swarm / Kubernetes + autoscaling
- GeoDNS + CDN (different servers by region)
Scalability
Scalability is the ability of casinos to sustain growth: hundreds to millions of users.
What includes:- Scale Horizontally: adding new instances
- Scale Up (CPU, RAM)
- Caching (Redis, Varnish) and CDN
- Division of API into modules (games, finance, analytics)
- Task queues (RabbitMQ, Kafka) and microservices
- Crash game server stands out as a separate microservice
- At peak load, the frontend is duplicated via CDN
- In live casinos, traffic from mobile is sent to separate nodes
Fault tolerance and safety
Database Replication- Backup every day
- Feilover (automatic failover)
- Monitoring: Grafana, Prometheus, UptimeRobot
- DDoS protection via Cloudflare/Radware/OVH
Examples of architectures
| Level | Technology |
|---|---|
| Balancing | NGINX, HAProxy, Cloud Load Balancer |
| Hosting | VPS, Dedicated, AWS EC2, GCP |
| Containerization | Docker, Kubernetes, Swarm |
| Autoscaling | Horizontal Pod Autoscaler (HPA) |
| CDN and Cache | Cloudflare, Redis, Bunny CDN |
Hosting, balancing and scalability is the base of technical reliability of online casinos. Not only uptime and speed depend on the choice of infrastructure, but also the ability to develop into new markets without overloads. The earlier the project lays down the correct architecture, the easier it is to scale without loss of quality.
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