Which of the following approaches provides the lowest cost for Amazon Elastic Block Store snapshots while
giving you the ability to fully restore data?
A.
Maintain two snapshots: the original snapshot and the latest incremental snapshot.
B.
Maintain a volume snapshot; subsequent snapshots will overwrite one another
C.
Maintain a single snapshot the latest snapshot is both Incremental and complete.
D.
Maintain the most current snapshot, archive the original and incremental to Amazon Glacier.
I guess A since B is just a Volume, C is worded strange as the definition of incremental is not a complete backup, D is going to cost more as there are 3 snapshots instead of just 1+incremental.
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Changing to C.
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Yes, it’s A as we want to fully restore data. If we consider option C, it wont be useful in case where our instance ran into 1/2 checks issue. So, we can chose option A in that case where we can use original(first snapshot) to restore to last known good configuration.
Also, as per referring the whitepaper, we can say A will be most suitable option.
https://d0.awsstatic.com/whitepapers/Storage/Backup_and_Recovery_Approaches_Using_AWS.pdf
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A is incorrect. C is the correct answer:
“Even though snapshots are saved incrementally, the snapshot deletion process is designed so that you need to retain only the most recent snapshot in order to restore the volume.”
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-deleting-snapshot.html
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Agree with C
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C
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This question is well discussed under Cloud Architect topic. Answer is C
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