high availability (HA)
Keep the service usable through specified failures and recovery procedures.
Use this when A single machine or zone failure must not exceed the service’s outage budget.
without the term
“A node or zone failure must fit our outage budget. Define and test the complete recovery path.”
with the term · How do you ask a model for high availability (HA)?
Define the HA target and failure scope. Verify a failover drill using successful user requests and recovery time.
What is high availability (HA)?
High availability combines redundancy, failure detection, routing, and recovery to meet an availability target. The target needs a defined user operation, measurement window, and failure scope.
Why does high availability (HA) matter when vibe coding?
An agent can count replicas while ignoring a shared power source, failed routing, or exhausted connections.
How do you do high availability (HA)?
Define the availability objective and failure domains. Drill node and zone loss. Measure successful user operations and recovery duration, then restore redundancy.
What goes wrong with high availability (HA)?
An HA setup is not a backup strategy or a promise of zero downtime and zero data loss.
Sources for this entry
- Microsoft: Reliability targets
Availability targets must define a measurement scope, time window, and failure/recovery objectives.
- PostgreSQL: Failover
Promotion, client routing, preventing the old primary from continuing as a writer, and restoring redundancy.
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