Database failover
Promote a replica mid-traffic. Most apps survive; their connection pools often do not.
⚠ Guide
Failover testing: does the backup actually take over?
Failover testing proves your standby actually takes over when the primary fails, and measures how long the switch takes. Test database, zone, region and provider failover separately, under real traffic, because the database usually recovers fast and the app is what lags behind.
Four failovers worth testing
Zone failover
Take an availability zone away and watch load balancers, queues and caches rebalance.
Region failover
The big one. Tests DNS, data replication and whether anyone remembers the runbook.
Provider failover
Fail your payment, email or ISP provider and prove the secondary path works.
What to measure
Time to detect, time to fail over, errors served during the gap, and whether it fails back cleanly. The fail-back is where most surprises live.
Failover testing FAQ
+ Is it safe to test failover in production?
With guardrails, yes. Start with a single replica or zone, cap the duration and abort automatically if error rates cross your SLO.
+ How long should failover take?
Whatever your SLO allows. Measure it first; most teams find their real number is several times their assumed one.
Safe by design
Every fault Oh My GDaaS runs is aimed at infrastructure you have proved you own, through a DNS record, a scoped cloud role or a deployed agent. Every run has a blast-radius limit, a hard time limit and an abort button. We are not a booter, stresser or DDoS service and never will be.