CONCEPTS
Resilience levels
The resilience level declared on a Project controls replica distribution across Zones. It defines the trade-off between cost and fault tolerance.
Levels
Impact by resource type
- Compute — replicas distributed per level; automatic internal load balancing.
- Datastore — in multi-zone, enables
ha(managed replica and failover). In multi-region, async replication is default; sync on Enterprise contracts. - Archive — cross-zone replication for object storage; block volumes live in the owning Compute's Zone.
- Fabric — one private network per Zone with automatic interconnection.
- Gateway — in multi-region, routing by client proximity (planned).
- Autoscale — scales across all involved Zones.
Changing the level
Changes apply online. Promoting from unica to multi-zona allocates replicas in additional Zones without interrupting existing ones; the reverse releases extra Zones at billing cycle end.
Promoting a production Datastore to ha=true may require a short maintenance window for initial synchronization.