Starting and stopping
For cluster operations, perform starting and stopping from the cluster application. If starting and stopping are performed by using the pg_ctl command or WebAdmin during failover operation, the cluster application will misjudge that services have gone down, resulting in unexpected behaviors.
Switching
There are two ways to switch between the active node and the standby node, as shown below.
Under normal circumstances, switch using mutual switch. In an emergency, for example when there is no response from the active node, perform forced switch. Forced switch should only be used in emergency scenarios because the differences in Symfoware stop modes when the active node is offline will cause the statistics to be initialized, and the load will increase as crash recovery is performed after the switch.
Mutual switch
Refer to "3.6.2.4 Mutual Switch".
Symfoware is stopped with the "fast" mode of the pg_ctl command.
Forced switch
Right-click the cluster application object, and select [Switch] from the menu. From the switchable nodes displayed in the drop-down menu, select a target node, and switch the cluster application to that node.
Symfoware is stopped with the "immediate" mode of the pg_ctl command.
