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Google Cloud Platform (GCP)

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  • Synopsis
  • Cluster Configuration Options
  • GCP Zones
  • Integrations
  • More Information

Atlas supports deploying clusters onto Google Cloud Platform (GCP). This page provides reference material related to Atlas cluster deployments on Google Cloud. You can't deploy serverless instances on Google Cloud.

Depending on your cluster tier, Atlas supports the following Google Cloud regions. While all of the following regions support M10+ clusters, some regions don't support Free or Shared-Tier clusters. A check mark indicates support for Free or Shared-Tier clusters. The Atlas API uses the corresponding Atlas Region.

Each Atlas cluster tier comes with a default set of resources. Atlas provides the following resource configuration options:

The size of the server root volume. Atlas clusters deployed onto Google Cloud use SSD persistent storage [1].

RAM Availability

The actual amount of RAM available to each cluster tier might be slightly less than the stated amount, due to memory that the kernel reserves.

The following cluster tiers are available:

Cluster Tiers
Default Storage
Default RAM
.5 GB
2 GB
5 GB
10 GB
1.7 GB
20 GB
3.8 GB
40 GB
7.5 GB
80 GB
15 GB
80 GB
16 GB
160 GB
30 GB
160 GB
32 GB
320 GB
60 GB
320 GB
64 GB
750 GB
120 GB
750 GB
128 GB
1500 GB
240 GB
1500 GB
256 GB
2000 GB
360 GB
2000 GB
384 GB
3000 GB
512 GB
4096 GB
640 GB

Can use this tier for a multi-cloud cluster.

Unavailable in the following regions:


Atlas limits R-class instances to the following regions:

  • asia-east1
  • asia-northeast1
  • asia-southeast1
  • europe-west1
  • europe-west2
  • europe-west4
  • us-central1
  • us-west1
Cluster Tier & API Naming Conventions

For purposes of management with the Atlas Administration API, cluster tier names that are prepended with R instead of an M (R40 for example) run a low-CPU version of the cluster. When creating or modifying a cluster with the API, be sure to specify your desired cluster class by name with the providerSettings.instanceSizeName attribute.

Multi-Cloud Low-CPU clusters

Low-CPU cluster tiers (R40, R50, R60, etc) are available in multi-cloud cluster configurations as long as the cluster tier is available for all the regions that the cluster uses.

Workloads typically require less than 2TB of storage.

Atlas configures the following resources automatically and does not allow user modification:

The input/output operations per second (IOPS) [1] the system can perform. This value is fixed at 30 IOPS per GB for reads and 30 IOPS per GB for writes for a total of 60 IOPS per GB.


The M30 cluster has a default storage size of 40 GB. This results in a maximum read speed of 1,200 IOPS and a maximum write speed of 1,200 IOPS. Increasing the storage size to 100 GB per cluster increases the maximum read speed of 3,000 IOPS and a maximum write speed of 3,000 IOPS.

Google Cloud storage volumes are always encrypted.

Each Google Cloud region includes a set number of independent zones. Each zone has power, cooling, networking, and control planes that are isolated from other zones. For regions that have at least three zones (3Z), Atlas deploys clusters across three zones. For regions that only have two zones (2Z), Atlas deploys clusters across two zones.

The Atlas Add New Cluster form marks regions that support 3Z clusters as Recommended, as they provide higher availability.

The number of zones in a region has no effect on the number of MongoDB nodes Atlas can deploy. MongoDB Atlas clusters are always made of replica sets with a minimum of three MongoDB nodes.

For general information on Google Cloud regions and zones, see the Google documentation on regions and zones.

If the selected Google Cloud region has at least three zones, Atlas clusters are split across three zones. For example, a three node replica set cluster would have one node deployed onto each zone.

A 3-node replica set deployed across a 3-zone GCP region.

3Z clusters have higher availability compared to 2Z clusters. However, not all regions support 3Z clusters.

[1](1, 2) For detailed documentation on Google storage options, see Storage Options.

Along with global region support, the following product integrations enable applications running on Google Cloud, such as Google Compute Engine, Google Cloud Functions, Google Cloud Run, and Google App Engine, to use Atlas instances easily and securely.

For more information on how to use Google Cloud with Atlas most effectively, review the following best practices, guides, and case studies:

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