System design scaling guide
Free system design module: scaling, health probes, timeouts, and observability. First topics open in the browser — no sign-up.
Free system design module on scaling, reliability, and observability. First topics open with no account.
This guest module maps load, redundancy, and how you know the system is sick — health checks, metrics, and logs. It is the scaling track paid users study, with the first topics unlocked.
The production labs are concrete instances of these ideas: HikariCP is a capacity limit, RestTemplate is a missing timeout (reliability), Actuator is observability gone wrong. Read the module, then run a lab.
What you will cover
- Vertical vs horizontal scaling
- Health, readiness, and liveness
- Metrics that actually page you
- Timeouts, retries, and backoff
- First topics free in the browser
Related free labs and modules
Common questions
Is there a free system design scaling tutorial?
Yes. This module’s first scaling, reliability, and observability topics are open without an account. Sign in for the rest of the system design track.
How do the debug labs relate to this module?
Labs are one incident. This module is the vocabulary: pools, timeouts, and probes. HikariCP, RestTemplate, and Actuator labs are the worked examples.
Do I need to draw diagrams to start?
No. The guest pages include the explanations in the browser. Sign in later for the full case-study set.
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