Round Robin
Round Robin sends each request to the next server in order. It looks tidy when servers are similar, but weaker servers can fall behind under pressure.
Interactive Systems Explainers
Load Balancer Playground
Experiment with routing choices and watch how traffic spreads, queues grow, and overloaded servers recover.
Key Observations
What to Notice
Random
Random routing scatters requests without looking at server load. Watch for uneven clusters and sudden local congestion.
Least Connections
Least Connections favors servers with less active and queued work. During spikes, it tends to spread stress and recover more smoothly.
Weighted
Weighted balancing gives stronger servers more traffic. The weak server receives fewer particles, so its queue usually grows more slowly.
Queues
Stacked particles are waiting requests. When arrivals outpace processing, the stack grows and the server starts glowing hotter.
Overload
Red glow, jitter, and slower motion mean the system is stressed. Congestion can push backward toward the load balancer.
Interactive Systems Explainers
Explore Next
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Retry Storms
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Circuit Breakers
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Autoscaling
OpenAdd workers automatically when the queue grows, then watch the system catch up.
Cache Stampede
OpenWatch synchronized cache misses overload a database, then tame them with protection.