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Zorluk: KolayResilient Database Configurations and High Availability

A company is migrating its transactional application to Amazon RDS. To prevent downtime during an infrastructure failure or an Availability Zone outage, the solutions architect must configure the database for automatic failover to a standby instance in another Availability Zone with zero manual intervention. Which database configuration should the solutions architect recommend?

  1. An Amazon RDS Multi-AZ deploymentCevap
  2. B
    An Amazon RDS Single-AZ deployment with a Read Replica in a different Availability Zone
  3. C
    An Amazon RDS Single-AZ deployment configured with Amazon Route 53 Latency routing
  4. D
    An Amazon RDS Single-AZ deployment paired with a warm standby database on an Amazon EC2 instance

Cevap

An Amazon RDS Multi-AZ deployment
The correct option is the Amazon RDS Multi-AZ deployment. Multi-AZ deployments provide high availability and failover support for DB instances. AWS automatically provisions and maintains a synchronous standby replica in a different Availability Zone. In the event of a failure, the primary DB instance is failed over to the standby replica automatically, ensuring high availability with zero administrative overhead.

Adım Adım Çözüm

1
Identify the high availability and recovery time objective requirements.
The company requires automated failover to a standby instance in a different Availability Zone with zero manual intervention.
This rules out solutions that require manual failover procedures or application-level reconfiguration.
2
Evaluate the failover and replication characteristics of the options.
RDS Multi-AZ uses synchronous replication to a standby replica in another AZ and performs automatic failover when the primary instance becomes unavailable. Read Replicas use asynchronous replication and require manual promotion.
Only RDS Multi-AZ satisfies the requirement for automatic, zero-intervention failover in another AZ.

Anahtar Kavram

Amazon RDS Multi-AZ deployments provide automatic failover and high availability by maintaining a synchronous standby replica in a different Availability Zone.
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Resilient Database Configurations and High Availability

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