Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 104 discussion

I agree its Elasticache -> AWS Elasticache If the same read query is performed over and over again

Elasticache is ideal in this scenario.

B. Implement Amazon ElastiCache to cache the large datasets. Amazon ElastiCache is a managed in-memory caching service that can be used to improve the performance of web applications by allowing you to retrieve information from fast, managed, in-memory caches, instead of relying entirely on slower disk-based databases. By caching frequently accessed datasets in ElastiCache, you can reduce the number of database calls and improve the overall performance of the application.

BBBBBBBBBBBBBBB

C is incorrect, because Read Replica is not meant to do cashing. So B is the only answer.

in the Choice B it is mentioned that to cache the large data sets. what if the large datasets wont get queried at all there is no advantage of elastic cache at all. if we cache the frequently queried data sets., then it will increase the performance. how ever in the given choices this matches the requirement. hence vote for B

Identical / Similar == ElastiCache always

Ans: B. Keyword Return Identical Dataset.

B looks right

Data and access pattern – Determining what to cache also involves understanding the data itself and its access patterns. For example, it doesn't make sense to cache data that changes quickly or is seldom accessed. For caching to provide a real benefit, the data should be relatively static and frequently accessed. An example is a personal profile on a social media site. On the other hand, you don't want to cache data if caching it provides no speed or cost advantage. For example, it doesn't make sense to cache webpages that return search results because the queries and results are usually unique. https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/elasticache-use-cases.html

Key term is identical datasets from the database it means caching can solve this issue by cached in frequently used dataset from DB

'There are frequent calls to return identical datasets " keyword for elasticache

Ans is B

Passed the exam on 26th June, this question was on my test.

I agree Elasticache too

Elasticache: static data Read replica: dynamic data so B over C

Answer is B. https://aws.amazon.com/getting-started/hands-on/boosting-mysql-database-performance-with-amazon-elasticache-for-redis/