3 ms·
It's not hard. The problem is operation team rarely exercise failures. Configure a test HA cluster in lab, and test it. If it works, push it to production. The
by majidazimi 9y ago
It's not hard. The problem is operation team rarely exercise failures. Configure a test HA cluster in lab, and test it. If it works, push it to production. The production system, should be continuously tested with real failures to see whether fail over mechanisms actually taking over the responsibility or not.
OF COURSE every thing is going to work in the lab, BUT MAY BE there is some other corner case in the production that you haven't considered yet. --- Louis C.K. after a sleepless night of switching primary DB to secondaries.