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Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 498 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C02
Question #: 498
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C02 Questions]

A company runs a fleet of web servers using an Amazon RDS for PostgreSQL DB instance. After a routine compliance check, the company sets a standard that requires a recovery point objective (RPO) of less than 1 second for all its production databases.
Which solution meets these requirements?

  • A. Enable a Multi-AZ deployment for the DB instance.
  • B. Enable auto scaling for the DB instance in one Availability Zone.
  • C. Configure the DB instance in one Availability Zone, and create multiple read replicas in a separate Availability Zone.
  • D. Configure the DB instance in one Availability Zone, and configure AWS Database Migration Service (AWS DMS) change data capture (CDC) tasks.
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by patriktre at Aug. 30, 2021, 5:31 p.m.
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patriktre
Highly Voted 3 years, 7 months ago
A is correct. Multi-AZ is using synchronous replication ensuring less than 1s RPO. Read replicas are assynchronous with lag up to 5 minutes in postgresql RDS
upvoted 34 times
GeniusMikeLiu
3 years, 7 months ago
'less than 1s RPO' how can you prove it? Any docs?
upvoted 2 times
ahaz
2 years, 10 months ago
https://aws.amazon.com/rds/features/multi-az/ Here it says 60 seconds automatic failover duration for multi AZ with one standby, and 35 seconds for two readable standbys. 1s RPO does not seem to be right. Now let's look at this: https://aws.amazon.com/blogs/database/implementing-a-disaster-recovery-strategy-with-amazon-rds/ It says that RPO and RTO is being measured by hour. So, less than 1 hour RPO and RTO still means 0. Given that, A seems to be the right answer
upvoted 2 times
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VijiTu
2 years, 11 months ago
I dont see anywhere 1s RPO in the aws docs
upvoted 1 times
etheng1970
2 years, 11 months ago
Read "https://aws.amazon.com/rds/features/multi-az/#:~:text=In%20an%20Amazon%20RDS%20Multi,standby%20instance%20without%20manual%20intervention." It state ZERO data loss... doesn't that achieved 1s RPO?
upvoted 2 times
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quangquydw
Highly Voted 3 years, 7 months ago
A is correct
upvoted 6 times
Rajjay
3 years, 6 months ago
A is correct. The question mentions about "Production Environment". The RDS Multi-AZ configuration is the recommended approach for production environments due to its ability to support low RTO (recovery time objective) and RPO (recovery point objective) requirements.
upvoted 8 times
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queen101
Most Recent 2 years, 9 months ago
AAAAAAAAA
upvoted 1 times
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marklovesaws143
2 years, 10 months ago
Selected Answer: A
AAAAAAAAAAA
upvoted 1 times
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slcheng
2 years, 10 months ago
Selected Answer: A
Active - Active mode
upvoted 2 times
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monazir
2 years, 10 months ago
Selected Answer: A
https://repost.aws/questions/QUaqdVjBiLT2uR_9DeA3btmw/rpo-for-multiple-az-rds
upvoted 4 times
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naveenagurjara
2 years, 10 months ago
Read replicas are for off loading read requests from main db and not for Failover. Situation asks for failover (RPO) so A (Multi AZ) is the correct ans.
upvoted 1 times
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etheng1970
2 years, 11 months ago
Selected Answer: A
Read "https://aws.amazon.com/rds/features/multi-az/#:~:text=In%20an%20Amazon%20RDS%20Multi,standby%20instance%20without%20manual%20intervention." It state ZERO data loss... doesn't that achieved 1s RPO?
upvoted 3 times
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roger66
2 years, 11 months ago
D is correct?
upvoted 1 times
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BrijMohan08
2 years, 11 months ago
Selected Answer: D
https://aws.amazon.com/blogs/database/implementing-a-disaster-recovery-strategy-with-amazon-rds/
upvoted 2 times
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IT_Learner27
3 years, 1 month ago
Selected Answer: C
why not C?
upvoted 2 times
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greyhats13
3 years, 1 month ago
Selected Answer: A
A is correct.
upvoted 2 times
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mgari
3 years, 2 months ago
Selected Answer: A
RDS Multi-AZ configuration i found some examples for 1 second
upvoted 2 times
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gsaini
3 years, 3 months ago
A is correct answer.
upvoted 1 times
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sayed
3 years, 3 months ago
A Because Multi-AZ uses sync replication which means that the write will happen on active and standby instances at the same time
upvoted 1 times
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Shakilibm
3 years, 3 months ago
Selected Answer: A
It should be A
upvoted 2 times
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envest
3 years, 3 months ago
IMO: Multi-AZ RPO is zero: https://aws.amazon.com/blogs/database/managed-disaster-recovery-with-amazon-rds-for-sql-server-using-cross-region-automated-backups/#:~:text=Amazon%20RDS%20Multi,0
upvoted 1 times
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