Extended Parallel Server allows you to define multiple storage-manager instances, but only one instance per node. You can configure and use different storage-manager brands for different purposes. (ON-Bar works with a storage manager to back up and restore data.)
The parameters that describe each storage manager are in the storage-manager section of the ONCONFIG file. Each storage-manager section begins with the BAR_SM parameter and ends with the END parameter. The BAR_SM parameter cannot be embedded in the coserver-specific section or nested.
If you define one storage manager on Extended Parallel Server, specify the storage-manager number in the BAR_SM parameter and specify the coservers where you want to run ON-Bar processes in the BAR_WORKER_COSVR parameter.
If you define multiple storage managers, you need to set the storage-manager parameters for each node.
However, you can specify certain storage-manager parameters in the global section of the ONCONFIG file if you want to use the same values for all storage-manager instances.
The following table shows the storage-manager specific parameters for ON-Bar. For more information, refer to the IBM Informix: Backup and Restore Guide.
Figure 7 shows an excerpt of the storage-manager section in a sample ONCONFIG file for two storage managers, ABEL and BAKER. This configuration starts ON-Bar processes on coservers 1, 2, and 3. Coservers 1 and 2 are on the same node. Coserver 3 is on a different node. You can optionally override global configuration parameters with the storage-manager specific configuration parameters.
# storage manager ABEL BAR_SM 1 BAR_WORKER_COSVR 1,2 END # storage manager BAKER BAR_SM 2 BAR_WORKER_COSVR 3 END