Use Ops Manager Automation to start an initial sync process on one or more MongoDB instances. This resynchronizes data stored on MongoDB nodes in clusters.
Considerations
- You can only resync secondary nodes. - A node might become the primary between the time when you trigger a resync and when it runs. In this case, the MongoDB Agent waits for you to connect to the node manually and run the - rs.stepDown()command.
- You can only schedule one node in any given replica set to resync at a given time. While one node resyncs, the Ops Manager disables the Resync option for all other nodes. 
Trigger Initial Sync
Navigate to the Clusters view for your deployment.
- If it is not already displayed, select the organization that contains your desired project from the Organizations menu in the navigation bar. 
- If it is not already displayed, select your desired project from the Projects menu in the navigation bar. 
- If it is not already displayed, click Deployment in the sidebar. 
- Click the Clusters view. 
Tip
lastResync parameter in the Ops Manager Automation configuration for MongoDB instances.