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Exam AWS Certified Database - Specialty topic 1 question 68 discussion

Exam question from Amazon's AWS Certified Database - Specialty
Question #: 68
Topic #: 1
[All AWS Certified Database - Specialty Questions]

A Database Specialist is working with a company to launch a new website built on Amazon Aurora with several Aurora Replicas. This new website will replace an on-premises website connected to a legacy relational database. Due to stability issues in the legacy database, the company would like to test the resiliency of
Aurora.
Which action can the Database Specialist take to test the resiliency of the Aurora DB cluster?

  • A. Stop the DB cluster and analyze how the website responds
  • B. Use Aurora fault injection to crash the master DB instance
  • C. Remove the DB cluster endpoint to simulate a master DB instance failure
  • D. Use Aurora Backtrack to crash the DB cluster
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
by BillyC at July 28, 2020, 4:52 p.m.
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TonyGe
Highly Voted 3 years, 9 months ago
B. https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Managing.FaultInjectionQueries.html
upvoted 7 times
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jitesh_k
Most Recent 1 year, 8 months ago
Cannot be A because stopping the DB cluster means application does not have a Database at all. Cannot be C because removing DB cluster endpoint will also mean the same thing as above. D is just a distractor - backtrack cannot crash a cluster. B makes sense - it crashes one instance and allows Aurora to recover.
upvoted 1 times
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Pranava_GCP
1 year, 11 months ago
Selected Answer: B
B. Use Aurora fault injection to crash the master DB instance
upvoted 2 times
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novice_expert
3 years, 3 months ago
Selected Answer: B
B. Use Aurora fault injection to crash the master DB instance
upvoted 4 times
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myutran
3 years, 9 months ago
Ans;: B
upvoted 3 times
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Ashoks
3 years, 10 months ago
It is B
upvoted 3 times
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BillyMadison
3 years, 10 months ago
B with the link that is provided in the suggested answer "You can test the fault tolerance of your Amazon Aurora DB cluster by using fault injection queries. Fault injection queries are issued as SQL commands to an Amazon Aurora instance and they enable you to schedule a simulated occurrence of one of the following events: A crash of a writer or reader DB instance A failure of an Aurora Replica A disk failure Disk congestion When a fault injection query specifies a crash, it forces a crash of the Aurora DB instance. The other fault injection queries result in simulations of failure events, but don't cause the event to occur. When you submit a fault injection query, you also specify an amount of time for the failure event simulation to occur for."
upvoted 4 times
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firbhat
3 years, 10 months ago
Ans B: Two ways to test/simulate fault tolerance • Manual failover • Fault injection queries
upvoted 3 times
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Billhardy
3 years, 11 months ago
will go with B
upvoted 1 times
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BillyC
3 years, 11 months ago
B is correct
upvoted 4 times
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C (25%)
B (20%)
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