Resilience track

What it covers

• Retry with Backoff and Jitter Retry transient failures with growing, randomised delays, a cap and a budget.
• Timeout Never wait forever on a remote call. Decide how long a call may take, and stop waiting after that.
• Circuit Breaker Stop calling a failing dependency for a while, fail fast, and probe to see when it has recovered.
• Bulkhead Give each dependency or workload its own resources so one failure cannot use up everything.
• Rate Limiting Cap how many requests a client may make in a period, and reject the rest early and cheaply.
• Circuit Breaker and Retries lab Crash, slow down or overload a dependency. Tune the breaker, timeouts, backoff and jitter, and see which settings contain the failure and which spread it.
• Bulkhead lab Share a thread pool between a critical and a slow dependency, watch checkouts starve, then partition the pool, tune the timeout and size each pool from the load.
• Rate Limiting lab Let one client flood a shared API and watch normal users suffer. Add a per-client token bucket, compare instant retries with honouring Retry-After, and see what a limit or burst that is too generous does.