Amazon Web Services (AWS)¶
Atlas supports deploying clusters onto Amazon Web Services (AWS). Atlas supports all AWS regions other than those in China and US GovCloud.
Depending on your cluster tier, Atlas supports the following
AWS regions. While all of the following
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 Region is the corresponding
region name used by the Atlas API.
Northern Virginia, USA
Montreal, QC, Canada
Northern California, USA
Sao Paulo, Brazil
This page provides reference material related to Atlas cluster deployments on AWS.
Cluster Configuration Options¶
Each Atlas cluster tier comes with a default set of resources. Atlas provides the following resource configuration options:
- Custom Storage Size
The size of the server root volume. Atlas clusters deployed onto AWS use general purpose SSDs .NoteRAM 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:Instance SizeDefault StorageDefault RAMM22 GBSharedM55 GBSharedM1010 GB2 GBM2020 GB4 GBM3040 GB8 GBM4080 GB16 GBR4080 GB16 GBM40_NVME380 GB15.25 GBM50160 GB32 GBR50160 GB32 GBM50_NVME760 GB30.5 GBM60320 GB64 GBR60320 GB64 GBM60_NVME1.6 TB61 GBM80760 GB131 GBR80750 GB122 GBM80_NVME1.6 TB122 GBM1001 TB160 GBM1401 TB192 GBM2001.5 TB256 GBR2001.5 TB256 GBM200_NVME3.1 TB244 GBM3002 TB384 GBR3002 TB384 GBR4003 TB488 GBM400_NVME4 TB512 GBR7004 TB768 GB
Can use this tier for a multi-cloud cluster.
Unavailable in the AP_SOUTHEAST_2 region.
Availability limited to the following regions:
NoteCluster Tier & API Naming Conventions
For purposes of management with the Atlas API, cluster tier names that are prepended with
Rinstead of an
R40for 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.instanceSizeNameattribute.ImportantMulti-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
- Custom Storage Speed
The input/output operations per second (IOPS) the system can perform.
Each cluster has a default IOPS rate. You can also choose to provision your tier's IOPS rate to meet your particular needs.
The selected cluster tier and custom storage size dictate the maximum IOPS for each storage speed.
- Encrypted Storage Volumes
- Encrypts the root volume for data at rest inside the volume and all data moving between the volume and the cluster. Atlas uses Amazon EBS encryption.
Amazon Availability Zones¶
Each AWS region includes a set number of independent availability zones. Availability Zones consist of one or more discrete data centers, each with redundant power, networking and connectivity, housed in separate facilities. For regions that have at least three availability zones (3AZ), Atlas deploys clusters across three availability zones. For regions that only have two availability zones (2AZ), Atlas deploys clusters across two availability zones.
The Atlas Add New Cluster form marks regions that support at least three availability zones as Recommended, as they provide higher availability.
The number of availability 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 more information on the number of availability zones in a given region, see the Amazon documentation on global infrastructure.
For more information on AWS regions and availability zones, see the Amazon documentation on using regions and availability zones
Regions with at Least Three Availability Zones¶
Atlas clusters deployed in regions with at least three availability zones are split across three availability zones. For example, a three node replica set cluster would have one node deployed onto each availability zone.
3AZ clusters have higher availability compared to 2AZ clusters. However, not all regions support 3AZ clusters.
Regions with Only Two Availability Zones¶
Atlas clusters deployed in regions with two availability zones are split across the two availability zones. For example, a three node replica set cluster would have two nodes deployed to one availability zone and the remaining node deployed to the other availability zone.
2AZ clusters have a higher chance of loss of availability in the event of the loss of an availability zone than 3AZ clusters. However, where latency or location are a priority, a region that supports 2AZ clusters may be preferred.
|||For detailed documentation on Amazon storage options, see Amazon EBS Volume Types|