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Question 13 - Professional Cloud Database Engineer discussion

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Your online delivery business that primarily serves retail customers uses Cloud SQL for MySQL for its inventory and scheduling application. The required recovery time objective (RTO) and recovery point objective (RPO) must be in minutes rather than hours as a part of your high availability and disaster recovery design. You need a high availability configuration that can recover without data loss during a zonal or a regional failure. What should you do?

A.
Set up all read replicas in a different region using asynchronous replication.
Answers
A.
Set up all read replicas in a different region using asynchronous replication.
B.
Set up all read replicas in the same region as the primary instance with synchronous replication.
Answers
B.
Set up all read replicas in the same region as the primary instance with synchronous replication.
C.
Set up read replicas in different zones of the same region as the primary instance with synchronous replication, and set up read replicas in different regions with asynchronous replication.
Answers
C.
Set up read replicas in different zones of the same region as the primary instance with synchronous replication, and set up read replicas in different regions with asynchronous replication.
D.
Set up read replicas in different zones of the same region as the primary instance with asynchronous replication, and set up read replicas in different regions with synchronous replication.
Answers
D.
Set up read replicas in different zones of the same region as the primary instance with asynchronous replication, and set up read replicas in different regions with synchronous replication.
Suggested answer: C

Explanation:

This answer meets the RTO and RPO requirements by using synchronous replication within the same region, which ensures that all writes made to the primary instance are replicated to disks in both zones before a transaction is reported as committed1.This minimizes data loss and downtime in case of a zonal or an instance failure, and allows for a quick failover to the standby instance1.

This answer also meets the high availability and disaster recovery requirements by using asynchronous replication across different regions, which ensures that the data changes made to the primary instance are replicated to the read replicas in other regions with minimal delay2.This provides additional redundancy and backup in case of a regional failure, and allows for a manual failover to the read replica in another region2.

asked 18/09/2024
Judith Persons
43 questions
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