Resilience management - Concept
HA
(High availability)
Designing a service so it stays available even when some parts fail
What's it for?
Keeps an important service available even when one of its parts fails.
For example…
The hospital booking service uses high availability so clinics aren’t blocked if one server dies.
An HA database runs with a ready replica so one server can fail without taking customer service offline
Think of it like…
A building with several lifts: if one breaks down, the others keep people moving