# Resource Manager Settings The resource manager settings panel is used to specify the control of automatic linking, merging and governance of resource edits in the system. The resource manager specifies the persistence strategy used (either MDM, SIM, or none which is the default mode of operation). ![](/files/qkHlAYeXKIby7PFz1vne) You can specify the resource manager you'd like to control resources in your deployment of the iCDR. * MIDM Data Repository => Indicates that the storage, linking, and de-duplication of objects should be controlled by the Master Data Management service. * Multiple copies of resources are kept representing the source system's view of that data * Merge and un-merge are non-destructive links within the database * SIM Data Repository => Indicates that the storage, linking, and de-duplication of objects should be controlled by the single instance mode service. * A single "golden" copy of a record is maintained by the iCDR - source systems are performing updates on the golden copy. * Merge is destructive action and un-merge is not possible You can specify the resources which you'd like to be managed using the strategy by checking their resource registration in the **Resources** property editor. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.santesuite.org/operations/server-administration/configuration-tool/persistence-settings/resource-manager-settings.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.