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MongoDB Atlas

New Beta Feature

Queryable Backup is available as a Beta feature.

MongoDB Atlas is a cloud service for running, monitoring, and maintaining MongoDB deployments, including the provisioning of dedicated servers for the MongoDB instances.

MongoDB Deployments

MongoDB deployments, or “clusters” in Atlas, can be either a replica set or a sharded cluster.

MongoDB Versions

Atlas supports MongoDB 3.2 and MongoDB 3.4 with the WiredTiger storage engine. You can specify the MongoDB version when you create a cluster. If a created cluster uses MongoDB 3.2, you can upgrade to MongoDB 3.4 when you scale a cluster. By default, Atlas uses MongoDB 3.2 except for Atlas Free Tier. Atlas Free Tier clusters deploy with MongoDB 3.4. For more information, see Atlas M0 (Free Tier) Limitations.

As new maintenance releases become available, Atlas will automatically upgrade to these releases via a rolling process to maintain cluster availability.

If the workload on the Atlas cluster is such that it impedes operations, including the ability to scale, MongoDB Atlas may, in some situations, create indexes in your cluster as a safeguard.


Atlas deploys each cluster across a minimum of three availability zones and with mandatory security.

Each mongod process is deployed to its own AWS EC2 instance. For sharded clusters, the six routers (the mongos processes) run on six of the shard servers; i.e. each of the six mongos processes shares an AWS EC2 instance with one mongod process.

Atlas Group

Your Atlas group manages your MongoDB deployments. An Atlas group can have multiple MongoDB clusters.

A unique AWS Virtual Private Cloud (VPC) is created for each Atlas group. All clusters for the group are deployed inside this VPC. This region-specific VPC is created for the Atlas group during the deployment of the group’s first cluster.


Atlas secures your deployments through the use of TLS/SSL, virtual private cloud (VPC) subnet with IP whitelists, and user authentication and authorization.


Atlas provides support for the use of the service itself. Support for development and performance of the database itself requires a MongoDB subscription. For details, contact MongoDB Inc..

Next Steps

To get started, see Getting Started.

Additional Resources