A server switchover can be triggered either manually from the user, or automatically with the Auto-Recovery function.
Regardless of what action triggered a switchover, the user must decide whether to switch back applications to their original server (failback), or let the spare server indefinitely take over those applications (takeover). Choosing takeover will result in the spare server becoming the new active server.
Refer to "10.3 Post-Switchover Operations" for details.
Different switchover methods are available according to each server's hardware configuration. Refer to the "Note" in "1.2 Hardware Environment" of the "ServerView Resource Coordinator VE Installation Guide" for details.
Note
During switchover, server restarts and configuration changes may trigger SNMP Traps (which are shown in the Event Log).
For details, refer to "Chapter 1 Resource Coordinator VE Messages" of the "ServerView Resource Coordinator VE Messages".
When using the backup and restore switchover method, do not start up the original primary server during or after the switchover operation.
The primary server and spare server both run the same system image. Having the two servers running together will cause conflicts of IP addresses and other information. This can adversely affect the applications recovered on the spare server.
If it becomes necessary to start the primary server, for maintenance or other tasks, ensure that it does not start up from the same system image as that of the spare server. This can be done by turning off the spare server first, or by stopping the primary server at its BIOS screen (before startup of the OS).
When using PRIMERGY BX servers, the maintenance LED of a switched over server is automatically activated.
Auto-Recovery
By enabling Auto-Recovery in the spare server settings of a server, it will be automatically switched over to a spare server when its status changes to either "error" or "fatal", and no response is obtained from its OS.
Manual Switchover
Use the following procedure to manually switch over applications from a primary server to a spare server.
Manual switchover can be either performed at will when necessary, or to verify that the switchover process operates properly.
Refer to "Conditions for Server Switchover" in "9.3 Server Switchover Conditions" of the "ServerView Resource Coordinator VE Setup Guide" for details on the conditions for a server switchover.
In the RC console's resource tree, right-click the physical OS or VM host to be switched, and from the popup menu select [Spare Server]-[Switchover].
The [Execute Switchover Operation] dialog is displayed.
Select the switchover destination server.
If "Automatic allocation" is selected, the switchover destination server is automatically selected.
Click the <OK> button.
The primary server stops, and the physical OS or VM host starts on the spare server.
Information
Manual switchover can be performed regardless of the status of the primary server.
