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AWS Certified Solutions Architect - Associate · AWS
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
Read replicas are replications of original databases and are the most suitable option for running scripts here.
Ans B - as per Gil80 (1 year, 10mth ago) "Selected Answer: B • You have a production DB that is taking on a normal load • You want to run a reporting application to run some analytics • You create a read replica to run the new workload there • The prod application is unaffected • Read replicas are used for SELECT (=read) only kind of statements Therefore I believe B to be the better answer. As for "D" - ElastiCache use cases are: 1. Your data is slow or expensive to get when compared to cache retrieval. 2. Users access your data often. 3. Your data stays relatively the same, or if it changes quickly staleness is not a large issue. 1 - Somewhat true. 2 - Not true for our case. 3 - Also not true. The data changes throughout the day. For my understanding, caching has to do with millisecond results, high-performance reads. These are not the issues mentioned in the questions, therefore B."
option B for sure, read replica is designed for this very use case, improving performance, on the other hand, enabling multi-AZ improves availability and not performance.