балансировка нагрузки (вид клиента): компромиссы

Question

Accepted Answer

Statelessness — price of horizontal scale worth paying. Sticky sessions smell for HTTP, necessity for WebSocket.

## Разбор

- **Statelessness worth paying.** Per-session state → shared stores (Redis, DB, token) so any server serves any request.
- **Sticky sessions smell for HTTP, necessity for WebSocket.** HTTP stickiness usually means leaked state on server.
- **When NOT rely on LB:** real-time apps — connection doesn't survive deploy. **Client owns reconnect with backoff** and resume cursor.
- **Client-side LB** (client picks endpoints, DNS multiple A records) — multi-region failover, less single choke point.

## Итог

Push state to shared storage; stickiness only where physics requires (WebSocket); client reconnect mandatory for real-time.