Multi-AZ deployments
A deployment strategy in AWS that improves availability and fault tolerance by distributing resources across multiple Availability Zones.
Description
Multi-AZ (Availability Zone) deployments in Amazon Web Services (AWS) enhance the resilience and availability of applications by deploying resources across multiple, isolated data centers within a region. Each Availability Zone is designed to be independent from failures in other zones, which means that if one zone fails, the application can continue to operate from another zone. This strategy is especially critical for applications that require high availability and minimal downtime, such as financial services and e-commerce platforms. For instance, when using Amazon RDS (Relational Database Service), a Multi-AZ deployment automatically provisions a synchronous standby replica in a different Availability Zone. In the event of a failure, RDS can automatically failover to the standby instance with minimal interruption. This setup not only helps in disaster recovery but also facilitates maintenance operations without application downtime, ensuring a seamless experience for end-users.
Examples
- Amazon RDS Multi-AZ for database redundancy and failover support.
- Amazon Elastic Load Balancing distributing traffic across instances in multiple Availability Zones.
Additional Information
- Multi-AZ deployments are recommended for production environments requiring high availability.
- AWS charges additional fees for Multi-AZ deployments due to the underlying infrastructure costs.