Practice path · 9 games

Production Reliability

Work through scaling, queues, retries, duplicate prevention, observability, and resilience for production systems.

Best after the basics, especially for system design prep.

Scaling Intermediate

Route simulated traffic across backend servers using round robin, weighted round robin, least connections, and random strategies.

Reliability Advanced

Control queue growth, adaptive concurrency, health probes, and priority-aware load shedding during overload.

Reliability Advanced

Propagate deadlines, cancellation, bulkheads, and bounded fallbacks across dependency failure windows.

Queues Intermediate

Tune workers, retries, and dead-letter behavior while jobs move through an async queue with failures and poison messages.

Reliability Intermediate

Diagnose retry scenarios and choose safe idempotency behavior for payments, emails, imports, orders, PUT updates, and scarce inventory.

Observability Advanced

Build a bounded telemetry path for structured logs, trace context, sampling, batching, and safe attributes.

Observability Advanced

Direct incident response with RED, USE, service-level indicators, burn rates, and explicit recovery criteria.

Reliability Intermediate

Triage production incidents by choosing useful metrics, logs, traces, queue signals, database evidence, request ids, and alerting strategies.

Time: 6-9 minutes
Concept: Production observability, incident triage, metrics, logs, traces, and alerts

Reliability Intermediate

Diagnose dependency failures and choose circuit breaker, timeout, fallback, retry, half-open, and bulkhead strategies that reduce blast radius.

Time: 6-9 minutes
Concept: Circuit breakers, timeouts, retries, fallbacks, and dependency isolation