There are two types of clustering environments:
1) Individually deployed WebLogic server that points to the same Unifier DB.
2) WebLogic cluster of multiple managed servers, deployed with a single EAR file.
For both clustering environments, files must be placed on a shared drive that is accessible by other server machines that are operating in a clustering environment.
In addition, for the WebLogic cluster, the directory path must be the same for all WebLogic cluster servers because the same EAR file (and configuration setup) is used by all WebLogic cluster servers.
To setup a WebLogic cluster, refer to the WebLogic documentation for detailed instructions. After setting up the cluster, generate the EAR file and deploy Unifier using the EAR file as described in this guide.