Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 318 discussion

Amazon Aurora provides built-in security, continuous backups, serverless compute, up to 15 read replicas, automated multi-Region replication, and integrations with other AWS services. Redis supports replication: https://aws.amazon.com/elasticache/redis-vs-memcached/. When adding both solutions B seems the correct answer

B .. This solution provides a high level of reliability by using Amazon Aurora MySQL as the database service, which: Is a fully managed relational database service that supports up to 31 synchronous replicas across three Availability Zones (AZs) within a region. Provides automatic failover and redundancy through Multi-AZ deployments. Deploying the application in an Auto Scaling group on Amazon EC2 instances behind an Application Load Balancer provides: Elastic scaling of instances to match changing traffic demands. High availability through load balancing and instance replication across AZs. Storing sessions in an Amazon ElastiCache for Redis replication group adds: Caching capabilities with automatic failover and redundancy, ensuring high availability.

Option B is an obvious answer.

Neptune, MariaDB & Kinesis Firehose out! B is the right answer, very reliable with Aurora

A, C: store sessions in Neptune or Kinesis Firehose? -> out D: migrate MySQL to MariaDB instance out of the blue? -> out B is valid with classic architecture.

Highest availability is the key