What is the difference between single AZ and multi-AZ deployment?

Question

AHAMEDSATHICK MOHAMEDALI · Accepted Answer

In AWS, Single-AZ and Multi-AZ deployments mainly come up with services like Amazon RDS, EC2, and other managed databases. Here’s the differenceComparison: Single-AZ vs Multi-AZ Feature Single-AZ Multi-AZ Availability Limited – downtime if AZ fails High – automatic failover across AZs Performance Standard Slightly higher latency in writes (sync replication) Cost Lower Higher (standby instance costs) Best for Dev/test, non-critical apps Production, critical apps needing HA

What is the difference between single AZ and multi-AZ deployment?

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