Synchronizing parallel servers
A prerequisite for the continuous synchronization of parallel servers is that they are paired together. For more information, see pairing parallel servers with each other.
Parallel servers are automatically synchronized. Manual synchronization is only performed when a single server is converted to a parallel server. Manual synchronization can be performed via the application VDogParallelServerUtil.exe. For more information, see manual synchronization.
When changes are detected in the following data/ objects, parallel servers are automatically synchronized.
- Scheduler Job results
- Global server settings
- Job configuration
- Component types
- User management
- User data
- Upload classes
- Compare classes
In normal operation, synchronization takes place directly. If the server load is very high (e.g. many large check-in/check-out operations at the same time and / or many scheduler jobs running in parallel), a delay may occur.
If the synchronisation fails, no rollback will take place on the server that has already been changed.
FAQ:: Why was the last checked-in version of the component on a server overwritten during the parallel server operation?
If the connection between the two servers in parallel server mode fails and this goes unnoticed for a period of time, different versions of the component may have been checked-in on the two servers. When the connection is restored, a check of the serial number will be performed. The last checked in version on the server with the smaller serial number is kept and copied to the other server. The version on the server with the bigger serial number will be overwritten and will no longer be available.