Discuss Alibaba ACA-Cloud1 Exam Topic 5 Question 103

Cloud disks are reliable because they use_________ to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.

Aa distributed file management system with 3 redundant copies

Ba file system

Ca double copy distributed system

Da Linux file system

Suggested Answer: A

Cloud disks are reliable because they use adistributed file management system with 3 redundant copiesto provide block-level data storage for ECS instances, ensuring99.9999999% data reliability. This means that the data stored on cloud disks is automatically replicated across three different physical servers in the same zone. If one server fails, the data can still be accessed from the other two servers. Cloud disks also support snapshot backup and recovery, which can help users restore data to a previous point in time in case of accidental deletion or corruption.Reference:Elastic Compute Service (ECS) - Alibaba Cloud Academy, Cloud Disk - Alibaba Cloud Documentation Center

An ECS disk can be used jointly or separately to meet the requirements of different application scenarios. ECS disks are categorized into ephemeral SSD disks and cloud disks. Compared with ephemeral SSD disks, cloud disks are more reliable as they use a triplicate distributed system to provide block-level data storage for ECS instances, ensuring 99.9999999% data reliability.

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16 comments · newest first

Cordelia 1 month ago

I feel confident about A too.

Monroe 1 month ago

A is definitely the best choice here.

Floyd 1 month ago

D doesn't fit the context at all.

Nenita 2 months ago

C could work, but A is more specific.

Herminia 2 months ago

B seems too simple for such high reliability.

Temeka 2 months ago

I agree, A makes the most sense.

Lilli 2 months ago

I think it's A. Redundant copies are key for reliability.

Crista 2 months ago

Wow, I didn't know cloud disks were that reliable!

Dierdre 2 months ago

B is too basic, gotta be A for reliability.

Edgar 3 months ago

A seems right, but 99.9999999%? Really?

Charlette 3 months ago

I thought it was C, double copies sound solid.

Annmarie 3 months ago

It's definitely A, those redundant copies are key!

Celeste 3 months ago

I feel like the Linux file system option is a distraction here; I lean towards A for the reliability aspect.

Lisha 3 months ago

I’m a bit confused; I thought it could also be C since it mentions a double copy, but I’m not confident.

Lauran 3 months ago

I remember practicing a similar question where redundancy was key, so A sounds right to me.

Veda 4 months ago

I think the answer might be A, but I'm not entirely sure about the specifics of the distributed file management system.

Alibaba ACA-Cloud1 Exam - Topic 5 Question 103 Discussion