Restore a Cloud Manager Snapshot to Atlas
You can automatically restore a backup for a Cloud Manager deployment to an Atlas deployment.
Restore Considerations
In addition to the prerequisites, consider the following requirements and limitations when restoring from a Cloud Manager deployment.
You must have the Project Backup Admin role for the Cloud Manager project that contains the source clusters and the
Project Ownerrole for the Atlas projects that contain the target clusters.If the
DefaultRWConcernvalue on the source snapshot differs from theDefaultRWConcernvalue on the target cluster, Atlas overrides the value on the source snapshot with the value on the target cluster. If there is no value configured for theDefaultRWConcernon the target cluster, Atlas keeps the value ofDefaultRWConcernfrom the snapshot without explicit configuration. This may differ from the default value for that MongoDB version.
Sharded Clusters
If you are restoring from a sharded cluster, the source and target clusters must have the same number of shards.
Atlas can't restore a sharded cluster snapshot to a replica set.
This feature is unavailable for
M0clusters and for Serverless instances.You can only restore a Cloud Manager snapshot to a Atlas cluster if either both deployments run the same version of MongoDB server, or the Atlas deployment runs one version higher than the Cloud Manager deployment.
Restore a Cloud Manager Snapshot to Atlas
Atlas deletes all existing data on the target cluster prior to the restore. The target cluster is available for the duration of the restore.
Before you restore a snapshot from a Cloud Manager deployment to an Atlas deployment, ensure that the hosts for your Atlas deployment have sufficient storage space for the restored databases, plus additional space for dataset growth. Use db.stats() to find the current database size.
Also, the instance types of the nodes in the Atlas deployment must have at least as much memory and throughput capacity as the nodes in the Cloud Manager deployment.
To learn more, see Restoring a Deployment to MongoDB Atlas.