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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 several different physical locations. These locations are categorized by regions and Availability Zones.
Regions are large and widely dispersed into separate geographic locations. Availability Zones are distinct locations within a region that are engineered to be isolated from failures in other Availability Zones and provide inexpensive, low latency network connectivity to other Availability Zones in the same region.
Each region is completely independent. Any ElastiCache activity you initiate (e.g. creating
cache clusters) runs only in your current default region. The default region can be
changed by setting the EC2_REGION environment variable, or be overridden by using
--url parameter with the command line interface. See
Common Options for API Tools
for more information.
To create or work with a cache cluster in a specific region, use the corresponding regional service endpoint.
For a listing of ElastiCache endpoints, go to the "Regions and Endpoints" section of the Amazon Web Services General Reference.