Off - High Availability is not turned on.
Active - UVM is in Active mode.
Passive - UVM is in Passive mode.
Testing HA Failover
Note: The Attempt Auto-Resync setting is a quick way to restore high availability in a scenario where databases
on the active and passive servers are synchronized. It is not recommended for a production failover
scenario. Data loss can occur if databases are not synchronized.
To test failover:
1. Select the Attempt Auto Resync of Database When Connecting After Failover.
2. Unplug or power off the active server.
3. Wait for failover. Check that the passive is now the active.
4. Restore the active (turn on or plug in).
5. The auto re-sync should restore high availability configuration.
6. Note that the passive server will be acting as the active. Click the Switch Roles button to restore the server
partners to their original roles.
Using Medium Failover Mode
Use Medium Failover mode when you do not want the services on the passive appliance to start automatically
when the communication between pairs is lost.
The passive appliance waits in a pending state until you manually start the failover process. When your active fails,
you must log on to the appliance software to start the failover process to the passive appliance.
To use medium availability, you must turn on Medium Failover Mode. See Configuring High Availability.
To start the failover:
1. Log on to the appliance, and then select High Availability.
2. In the High Availability Maintenance section, click Failover to this UVM. Note that the button is only active
when the primary appliance is down.
Clicking the button starts the services and database.
Resuming and Suspending SQL Mirroring
You can suspend and resume SQL Server mirroring. You might want to pause mirroring if you want to take care of
maintenance tasks on the database server.
A failover cannot occur when the database is in a suspended state.
Note that if the appliance is in a failover state and mirroring is suspended, you can click Resume to start mirroring.
To resume or suspend mirroring:
1. Log on to the appliance, and then select High Availability.
2. Click Suspend to pause mirroring.
3. Click Resume to start mirroring again.
Using High Availability
UVM Appliance User Guide 46 © 2018. BeyondTrust Software, Inc.
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