Dataguard: Switchover vs Failover
Although you think you have verified that everything works after a switchover, you may have a hidden problem with the applications. You need to know how the applications will react if one of the network interfaces stops responding. Dataguard: Switchover vs Failover I have been using Data Guard for many years but have never had to do an actual failover in production; it has always been a switchover for planned maintenance. The other day, we did a controlled power-off of the standby side some days after a switchover. We discovered that many applications started to hang after this power-off, although they worked fine when both the standby and primary sides were online. ...