Advanced · Many small services, and stopping one failure from sinking the rest.
Microservices & circuit breakers
Splitting an app into services lets teams ship independently, but every call becomes a network hop that can be slow or fail. Without protection, one sick service ties up everyone waiting on it.
Try this
Run each experiment in the simulator above, then tick it off.
Key ideas
Monolith
One deployable app. Simple, fast in-process calls, but shared fate.
Microservices
Independent services. Isolated failures and scaling, but more hops, more latency and more to watch.
Circuit breaker
After repeated failures, stop calling the sick service for a while and return a fallback. Test now and then whether it has recovered.
In your Pabbly workflows
One huge do-everything workflow is a monolith; small workflows chained by webhooks are microservices. When an API in the chain is flaky, apply the breaker idea: after a few failures, route to a fallback (park the record in a sheet, notify the team) instead of letting every run fail on it.
Check yourself
0/2Get every question right to mark this lab done. Wrong answers let you try again.
Q1. What does an open circuit breaker do?
Failing fast frees the caller immediately, so waiting requests don't pile up behind a dead dependency.
Q2. A real cost of microservices compared with a monolith is…
Isolation isn't free: every boundary is a network call to secure, monitor and make resilient.
Lab complete
Marked done on this device. On to the next one.
Watch next
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