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The following diagram illustrates an example architecture of AWS Elastic Beanstalk across multiple Availability Zones working with other AWS products such as Amazon CloudFront, Amazon Simple Storage Service (Amazon S3), and Amazon Relational Database Service (Amazon RDS). For a more detailed discussion about Amazon Route 53, Elastic Load Balancing, Amazon Elastic Compute Cloud (Amazon EC2) and host manager (HM), see Architectural Overview.
To plan for fault-tolerance, it is advisable to have N+1 Amazon EC2 instances and spread your instances across multiple Availability Zones. In the unlikely case that one Availability Zone goes down, you will still have your other Amazon EC2 instances running in another Availability Zone. You can adjust Auto Scaling to allow for a minimum number of instances as well as multiple Availability Zones. For instructions on how to do this, see Launch Configuration. Fore more information about building fault-tolerant applications, go to Building Fault-Tolerant Applications on AWS.
The following sections discuss in more detail integration with Amazon CloudFront, Amazon CloudWatch, Amazon DynamoDB, Amazon ElastiCache, IAM, Amazon Route 53, Amazon RDS, Amazon S3, Amazon SimpleDB, and Amazon VPC.