Architecture Intermediate

Load Balancing algoritmy¶

Load BalancingNginxHAProxy 3 min read

Round Robin, Least Connections, Consistent Hashing a konfigurace v Nginx.

Algoritmy¶

• Round Robin — střídání 1-2-3-1-2-3
• Least Connections — na instanci s nejméně spojeními
• IP Hash — session persistence
• Consistent Hashing — pro distribuované cache

upstream backend {
    least_conn;
    server 10.0.0.1:8080 weight=3;
    server 10.0.0.2:8080 weight=2;
    server 10.0.0.3:8080 backup;
}

L4 vs L7¶

• L4 — IP/port, rychlý (AWS NLB, HAProxy TCP)
• L7 — HTTP headers, URL routing (Nginx, AWS ALB)

Summary¶

Least Connections je nejlepší default. Round Robin pro homogenní instance. Vždy konfigurujte health checks.

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