Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 63 discussion

C is correct.

C. Redis Keyphrases: "streaming company collects real-time data" "wants an in-memory database storage solution" https://aws.amazon.com/elasticache/ Amazon ElastiCache allows you to seamlessly set up, run, and scale popular open-Source compatible in-memory data stores in the cloud. Redis - real-time apps across versatile use cases like gaming, geospatial service, caching, session stores, or queuing, with advanced data structures, replication, and point-in-time snapshot support.

https://aws.amazon.com/elasticache/redis-vs-memcached/

Redis is in memory database , just not confuse with Redshift - redshift is postgres based data warehouse

https://aws.amazon.com/es/elasticache/redis-vs-memcached/

C is correct

REDIS • Multi AZ with Auto-Failover • Read Replicas to scale reads and have high availability • Data Durability using AOF persistence • Backup and restore features MEMCACHED • Multi-node for partitioning of data (sharding) • No high availability (replication) • Non persistent • No backup and restore • Multi-threaded architecture

Explanation: Amazon ElastiCache is an in-memory database. With ElastiCache Memcached there is no data replication or high availability. As you can see in the diagram, each node is a separate partition of data.

C. Amazon ElastiCache for Redis

Redis and Memacached both are okay for in-memory Cache but only redis can make replication.

C for sure

Given answer is correct

it's C

C right

Ans is C

C is correct for me.

A & B - Since we are talking about in-memory db, RDS in invalid option. C - correct answer D - Wrong, We need replication which is not supported by MemCached. ref: https://aws.amazon.com/elasticache/redis-vs-memcached/