Redundancy state descriptions
- Last UpdatedJan 16, 2025
- 2 minute read
If you have configured redundant engines, the status both partner engines (active and standby) will be shown. Additionally, the redundancy status of the partner engine is listed with the partner engine name. The name of the platform on which the partner engine is deployed is listed as well.
You will also be able to see if an engine is running on-scan or off-scan, its standby status, and upgrade status.
Note: When the local engine is shutdown, no partner status will be shown (field will be empty).
|
Engine status |
Redundancy status |
Description |
|---|---|---|
|
Standby - Ready |
Active |
Engine is running and can communicate with its partner engine. |
|
Running On Scan |
Active - Standby Not Available |
Engine is running but cannot communicate with its partner engine. |
|
Running On Scan |
Active - Upgrade |
Partner engine software must be upgraded. |
|
Determining Failover Status |
Determining Failover Status |
Engine is starting but is not yet able to resolve the state of its partner engine. |
|
Standby - Ready |
Standby - Ready |
Standby engine is available and can switch to active if active engine fails or if commanded. |
|
Standby - Missed Heartbeats |
Standby - Missed Heartbeats |
Standby engine is not receiving heartbeats from its active partner engine, but the number of missed heartbeats is not currently sufficient to establish that failure has occurred. |
|
Standby - Not Ready |
Standby - Not Ready |
Standby engine cannot communicate with the active engine, or engines are out of sync. |
|
Standby - Syncing Code |
Standby - Syncing Code |
Standby engine is synchronizing code modules with active engine. |
|
Standby - Syncing Data |
Standby - Syncing Data |
Standby engine is synchronizing all object-related data with active engine, and will now transition to Standby - Ready state. |
|
Standby - [Ready] |
Switching to Active |
Backup engine has been commanded to take over as active engine. |
|
Switching to Standby |
Switching to Standby |
Active engine has been commanded to switch to standby engine. |
|
Standby Not Available |
Standby Not Available |
Partner engine has crashed or has been shutdown. |
|
Standby Not Available |
Standby Not Available |
Communication with the partner engine has been lost. |
To force failover to partner engine
Note: Force failover applies only to redundant engines. It can only be invoked when the active engine is running (either on- or off-scan) and the status of the partner engine is Standby - Ready.
-
Select the engine to failover.
-
When the engine is highlighted, select the Force Failover button. Alternatively, you can right click to display a context menu, and then select Force Failover to Partner.
