Prev Question
Next Question

Which procedure for backing up a relational database on EC2 that is using a set of RAlDed EBS volumes for
storage minimizes the time during which the database cannot be written to and results in a consistent backup?

A.
1. Detach EBS volumes, 2. Start EBS snapshot of volumes, 3. Re-attach EBS volumes

B.
1. Stop the EC2 Instance. 2. Snapshot the EBS volumes

C.
1. Suspend disk I/O, 2. Create an image of the EC2 Instance, 3. Resume disk I/O

D.
1. Suspend disk I/O, 2. Start EBS snapshot of volumes, 3. Resume disk I/O

E.
1. Suspend disk I/O, 2. Start EBS snapshot of volumes, 3. Wait for snapshots to complete, 4. Resume disk
I/O

Explanation:
https://aws.amazon.com/cn/premiumsupport/knowledge-center/snapshot-ebs-raid-array/ To create an
“application-consistent” snapshot of your RAID array, stop applications from writing to the RAID array, and flush
all caches to disk. Then ensure that the associated EC2 instance is no longer writing to the RAID array by
taking steps such as freezing the file system, unmounting the RAID array, or *shutting down the associated
EC2 instance*. After completing the steps to halt all I/O, take a snapshot of each EBS volume. http://
docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-detaching-volume.html You can detach an Amazon
EBS volume from an instance explicitly or by terminating the instance. However, if the instance is running, you
must first unmount the volume from the instance.”

Prev Question
Next Question

Leave a Reply

Your email address will not be published. Required fields are marked *