Choosing Regions and Availability Zones

AWS Cloud computing resources are housed in highly available data center facilities. To provide additional scalability and reliability, these data center facilities are located in different physical locations. These locations are categorized by regions and Availability Zones.

AWS Regions are large and widely dispersed into separate geographic locations. Availability Zones are distinct locations within an AWS Region that are engineered to be isolated from failures in other Availability Zones. They provide inexpensive, low-latency network connectivity to other Availability Zones in the same AWS Region.

Important

Each region is completely independent. Any MemoryDB activity you initiate (for example, creating clusters) runs only in your current default region.

To create or work with a cluster in a specific region, use the corresponding regional service endpoint. For service endpoints, see Supported Regions & endpoints.

Locating your nodes

Any cluster that has at least one replica must be spread across AZs. The only way you can locate everything within a single AZ is with a cluster comprised of single-node shards.

By locating the nodes in different AZs, MemoryDB eliminates the chance that a failure, such as a power outage, in one AZ will cause loss of availability.

• Creating a MemoryDB cluster

• Modifying a MemoryDB cluster

Supported Regions & endpoints

MemoryDB is available in multiple AWS Regions. This means that you can launch MemoryDB clusters in locations that meet your requirements. For example, you can launch in the AWS Region closest to your customers, or launch in a particular AWS Region to meet certain legal requirements. In addition, as MemoryDB expands availability to a new AWS Region, MemoryDB supports the two most recent MAJOR.MINOR versions at that time for the new Region. For more information on MemoryDB versions, see Redis OSS engine versions.

By default, the AWS SDKs, AWS CLI, MemoryDB API, and MemoryDB console reference the US-East (N. Virginia) Region. As MemoryDB expands availability to new regions, new endpoints for these regions are also available to use in your HTTP requests, the AWS SDKs, AWS CLI, and the console.

Each Region is designed to be completely isolated from the other Regions. Within each region are multiple Availability Zones (AZ). By launching your nodes in different AZs you achieve the greatest possible fault tolerance. For more information on regions and Availability Zones, see Choosing Regions and Availability Zones at the beginning of this topic.

Regions where MemoryDB is supported
Region Name/Region	Endpoint	Protocol
US East (Ohio) Region us-east-2	memory-db.us-east-2.amazonaws.com	HTTPS
US East (N. Virginia) Region us-east-1	memory-db.us-east-1.amazonaws.com	HTTPS
US West (N. California) Region us-west-1	memory-db.us-west-1.amazonaws.com	HTTPS
US West (Oregon) Region us-west-2	memory-db.us-west-2.amazonaws.com	HTTPS
Canada (Central) Region ca-central-1	memory-db.ca-central-1.amazonaws.com	HTTPS
Asia Pacific (Hong Kong) Region ap-east-1	memory-db.ap-eastl-1.amazonaws.com	HTTPS
Asia Pacific (Mumbai) Region ap-south-1	memory-db.ap-south-1.amazonaws.com	HTTPS
Asia Pacific (Tokyo) Region ap-northeast-1	memory-db.ap-northeast-1.amazonaws.com	HTTPS
Asia Pacific (Seoul) Region ap-northeast-2	memory-db.ap-northeast-2.amazonaws.com	HTTPS
Asia Pacific (Singapore) Region ap-southeast-1	memory-db.ap-southeast-1.amazonaws.com	HTTPS
Asia Pacific (Sydney) Region ap-southeast-2	memory-db.ap-southeast-2.amazonaws.com	HTTPS
Europe (Frankfurt) Region eu-central-1	memory-db.eu-central-1.amazonaws.com	HTTPS
Europe (Ireland) Region eu-west-1	memory-db.eu-west-1.amazonaws.com	HTTPS
Europe (London) Region eu-west-2	memory-db.eu-west-2.amazonaws.com	HTTPS
EU (Paris) Region eu-west-3	memory-db.eu-west-3.amazonaws.com	HTTPS
Europe (Stockholm) Region eu-north-1	memory-db.eu-north-1.amazonaws.com	HTTPS
Europe (Milan) Region eu-south-1	memory-db.eu-south-1.amazonaws.com	HTTPS
South America (São Paulo) Region sa-east-1	memory-db.sa-east-1.amazonaws.com	HTTPS
China (Beijing) Region cn-north-1	memory-db.cn-north-1.amazonaws.com.cn	HTTPS
China (Ningxia) Region cn-northwest-1	memory-db.cn-northwest-1.amazonaws.com.cn	HTTPS

For a table of AWS products and services by region, see Products and services by Region.

For a table of supported Availability Zones within Regions, see Subnets and subnet groups.