Hands-on simulators to explore distributed systems and cloud concepts. Pick a topic and start experimenting.
Visualize producers, partitions, consumer groups, and message flow in an interactive Kafka cluster simulation.
→Experiment with AWS API Gateway rate limiting — token buckets, throttling, and burst behavior in real time.
→Visualize sharding, replication, and failover. Hash slots, MOVED/ASK redirects, gossip-based promotion, and dynamicRefreshSources.
→JVM vs Netty DNS resolver — blocking vs async, TTL caching, EKS CoreDNS flow, and the FQDN/ndots query explosion. All interactive.
→How multiple pods coordinate to run a scheduled job exactly once. Lock race, all 11 QRTZ tables, misfire policies, failover, and Actuator health checks.
→Build the ServiceAccount + IAM trust policy, watch the AssumeRoleWithWebIdentity token exchange flow, inspect JWT claims, and diagnose real-world IRSA pitfalls.
→Side-by-side load test. Watch the thread-per-request model saturate while the reactive event loop keeps up — and see what happens when you accidentally block.
→Walk through the Authorization Code flow without PKCE, watch the interception attack steal a token, then see PKCE shut it down. JWT inspector and OIDC included.