Production Operator · Module
Locate replication delay, judge data-loss risk, and decide whether a standby is ready for a controlled failover.
Start the first section01 · Learn
Locate replication delay, judge data-loss risk, and decide whether a standby is ready for a controlled failover.
02 · Use it
Promoting an unhealthy or stale standby can extend an outage and lose more data than the agreed recovery target.
03 · Practise
Read each short section, answer a quick understanding check, then use real SQL to solve a guided task in your own temporary database.
04 · Prove it
Pass the SQL lab and the module assessment. Your result is saved to your signed-in account, and a module certificate is created if you pass.
Before you start