# Granular Restores for MongoDB

You can perform granular restores of MongoDB collections and databases to the same cluster or a different cluster. Granular restores use a 3DFS share on the MediaAgent in the destination cluster to stage instances.

Granular restores are not supported in Windows MongoDB cluster configurations that use a Windows MediaAgent.

By default, the Commvault software collects oplog dumps every 15 minutes. Increase in size of oplog dumps might affect the performance of MongoDB collection-based restores.

Granular recovery is intended for collections up to approximately 100 GB. Because it uses mongodump and mongorestore, recovery times can increase significantly with larger datasets. For collections of size >100 GB, perform a full cluster restore.

During granular restores, the Commvault software creates a persistent recovery job to stage the backup data on the 3dfs server. The persistent recovery job is listed in the job controller for ~24 hours and can be ignored.

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