Discuss Alibaba ACA-Developer Exam Topic 6 Question 96

For business scenarios with strong data reliability requirements or financial business scenarios with regulatory requirements related to data durability and availability, RDS MySQL provides a remote backup mechanism to improve reliability. Which of the following is correct, regarding RDS's remote disaster recovery capabilities? (Number of correct answers: 3)

AThe primary database (the one to be backed up) must have an Alibaba Cloud Intranet address

BRDS realizes real-time synchronization between the master instance and the remote disaster recovery instance through Data Transmission Service (DTS)

CWhen an outage occurs in the area where the primary instance is located, and neither the primary instance (Master) nor the standby instance (Slave) can be connected to, the remote disaster recovery instance can be switched to the primary instance

DWhen the database deletion operation is performed on the master instance, the operation will also be synchronized to the disaster recovery instance

Suggested Answer: D

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20 comments · newest first

Cherri 2 months ago

B and C are definitely right. DTS is essential for data safety.

Freeman 2 months ago

I agree with C. Disaster recovery is key for reliability.

Derick 2 months ago

D is tricky. Deleting should not sync to recovery.

Meaghan 3 months ago

C makes sense. Switching to remote is vital during outages.

Lai 3 months ago

A seems off. No need for Alibaba Cloud Intranet.

Roxanne 3 months ago

I think B is correct. Real-time sync is crucial.

Janessa 3 months ago

Wait, so deleting on the master also deletes on the backup? That’s risky!

Kristeen 3 months ago

D is a bit concerning, that could lead to data loss.

Matilda 3 months ago

C sounds right, switching to the remote instance is crucial during outages.

Marleen 4 months ago

A seems off, I don't think an Alibaba Cloud address is a must.

Cruz 4 months ago

B is definitely correct, DTS is key for that.

Lawanda 4 months ago

Wait, so if I delete something, it’s gone everywhere? That’s wild!

Timmy 4 months ago

D is true, deletions sync to the backup, that's risky!

Rene 4 months ago

C sounds right, but can it really switch automatically?

Valentin 6 months ago

A seems off, I thought you could use public IPs too.

Allene 6 months ago

B is definitely correct, DTS is key for syncing!

Felicidad 7 months ago

I recall that when you delete something in the master instance, it usually gets synced to the disaster recovery instance, so option D seems correct to me.

Audry 7 months ago

I’m a bit confused about option C; I thought the remote instance could only take over if the primary instance was completely down, but I’m not sure.

Hubert 7 months ago

I think option B sounds familiar because we discussed how DTS helps with real-time data synchronization in our practice sessions.

Benton 7 months ago

I remember something about needing an Alibaba Cloud Intranet address for the primary database, but I'm not entirely sure if that's a strict requirement.

Alibaba ACA-Developer Exam - Topic 6 Question 96 Discussion