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An anti-pattern is a common response to a recurring problem that is usually ineffective and risks being highly counterproductive. In cloud architecture, anti-patterns lead to workloads that are fragile, expensive, insecure, or difficult to operate. Understanding these anti-patterns — and knowing how to avoid them — is a critical skill for any cloud architect.
Deploying all resources in a single Availability Zone (AZ). If that AZ experiences an outage, the entire workload goes down.
Deploy across at least two Availability Zones. Use Elastic Load Balancing to distribute traffic and Auto Scaling to maintain capacity in each AZ. For databases, use Multi-AZ deployments in RDS or Aurora.
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