Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 193 discussion

Use ElastiCache to reduce reading and choose redis to ensure high availability.

A vs B: A: reduce the number of database reads on main + high availability provide B: only reduce the number of DB reads so A wins

This question is stupid! Both answers can be correct!

for high availability, the answer should be A

RDS read replicas are mainly used for higher performance, and not for higher availability, that's why I chose ElastiCache using Redis.

I Vote B since question is asking to reduce the database reads. Using Read replicas offloads the reading operation from main db but doesn't reduce it.

B is not correct. the effectiveness of caching depends on the application. it's not always a good solution.

why not read replica when you get read performant with HA?

Options B, C, and D are not directly related to ensuring high availability

I think it is B: https://aws.amazon.com/getting-started/hands-on/boosting-mysql-database-performance-with-amazon-elasticache-for-redis/ Although the question just says "RDS Database", it doesn't specify what type of DB.

Elasticahe is NOSQL, A is the Answer!

Pretty sure answer is option B. You have to use a caching to 'reduce' database reads so read replica is out of option. The question mentions High availability so Redis is preferable than MemCached.

the question is clearly says reduce reads request, so b is the naswer

Use ElastiCache to reduce reading and ensure high availability. Opt A read replica its for performance not HA I will vote for B

the answer should be A, read replicas enhance high availability by providing failover capabilities in case the primary instance becomes unavailable.

AvsB A:Creating read replicas will ensure the availability of the DB. (CORRECT) B: Will reduce the reading and what happens when there is more reads.

A. Add Amazon RDS read replicas. Amazon RDS read replicas allow you to create one or more read-only copies of your RDS database instance. By offloading read traffic to read replicas, you can distribute the workload across multiple database instances, reducing the load on the primary database and decreasing the number of reads it needs to handle. This helps to improve the overall performance and scalability of your application.