A user is trying to pre-warm a blank EBS volume attached to a Linux instance. Which of the below
mentioned steps should be performed by the user?
A.
There is no need to pre-warm an EBS volume
B.
Contact AWS support to pre-warm
C.
Unmount the volume before pre-warming
D.
Format the device
Explanation:
When the user creates a new EBS volume or restores a volume from the snapshot, the back-end
storage
blocks are immediately allocated to the user EBS. However, the first time when the user is trying
to access a block of the storage, it is recommended to either be wiped from the new volumes or
instantiated from the snapshot (for restored volumes. before the user can access the block. This
preliminary action takes time and can cause a 5 to 50 percent loss of IOPS for the volume when
the block is accessed for the first time. To avoid this it is required to pre warm the volume. Prewarming an EBS volume on a Linux instance requires that the user should unmount the blank
device first and then write all the blocks on the device using a command, such as “dd”.
C
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Ans : A
pre warming is only required for vol created from snapshots, not for blank vols
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Yes, as per new guidelines. There is no need to pre warm new volumes. For me The ans is A but as it looks the question is old so answer will be C.
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Answer is A to pass exam
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Answer: C
Explanation:
When the user creates a new EBS volume or restores a volume from the snapshot, the back-end storage blocks are immediately allocated to the user EBS. However, the first time when the user is trying to access a block of the storage, it is recommended to either be wiped from the new volumes or instantiated from the snapshot (for restored volumes. before the user can access the block. This preliminary action takes time and can cause a 5 to 50 percent loss of IOPS for the volume when the block is accessed for the first time. To avoid this it is required to pre warm the volume. Pre-warming an EBS volume on a Linux instance requires that the user should unmount the blank device first and then write all the blocks on the device using a command, such as “dd”.
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