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Zorluk: KolayResilient Database Configurations and High Availability

A financial services firm is deploying a web-based client portal. The portal uses an Amazon RDS DB instance to store transaction records. The database must remain highly available during a database instance failure or an Availability Zone outage, with automatic failover to a standby instance without manual intervention. Which Amazon RDS configuration should a solutions architect recommend to meet these requirements?

  1. A
    Create an Amazon RDS Read Replica in a different Availability Zone to serve as the automatic failover target.
  2. B
    Set up the database as a single-AZ DB instance and configure AWS Backup to restore it as a pilot light standby in a secondary Availability Zone.
  3. Configure the Amazon RDS DB instance to use a Multi-AZ deployment.Cevap
  4. D
    Configure Amazon Route 53 latency routing to route database connection traffic to a secondary single-AZ RDS DB instance in a different AWS Region.

Cevap

Configure the Amazon RDS DB instance to use a Multi-AZ deployment.
Configuring the Amazon RDS DB instance to use a Multi-AZ deployment is the standard method for achieving high availability on AWS. It replicates data synchronously to a standby instance in a different Availability Zone and automatically updates DNS records to point to the standby during a failure, ensuring automatic failover with no manual intervention.

Adım Adım Çözüm

1
Identify the high availability and automatic failover requirements.
The solution must handle an Availability Zone or instance failure automatically without manual intervention.
This establishes the need for a synchronous database configuration that supports automatic failover.
2
Evaluate the capabilities of Amazon RDS Multi-AZ deployments.
RDS Multi-AZ creates a synchronous standby replica in a separate Availability Zone and handles automatic failover if the primary fails.
This matches all stated requirements for resilience and automation.
3
Exclude options that do not support automatic failover or high availability.
Read replicas require manual promotion, pilot light is a disaster recovery pattern with high recovery time, and Route 53 latency routing does not replicate database state.
These alternatives fail to meet either the high availability or the zero-manual-intervention constraints.

Anahtar Kavram

Amazon RDS Multi-AZ deployments provide automatic failover and synchronous replication for high availability across different Availability Zones.
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Resilient Database Configurations and High Availability

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