When a storage resource has a snapshot taken of it, where are writes to the storage resource written?

The correct answer is A. New space allocated from the storage resource parent pool. Snapshots space are taken from parent pool not from the storage resource itself. Immediately after being created, a snapshot consumes almost no space for the pool as it still shares all of its blocks with the primary block or file resource. However as new data is written to the…

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Question

Options

ANew space allocated from the storage resource parent pool
BNew space allocated in 256 MB stripes from FAST Cache
CExisting space of the storage resource
DExisting space from the Reserves LUN Pool

How the community answered

(29 responses)

A
79% (23)
B
7% (2)
C
10% (3)
D
3% (1)

Explanation

Snapshots space are taken from parent pool not from the storage resource itself. Immediately after being created, a snapshot consumes almost no space for the pool as it still shares all of its blocks with the primary block or file resource. However as new data is written to the parent resource, redirects occurs, and the snapshot begins to consume pool space that is not also associated with the current production version of the parent resource.

Topics

#snapshot#write operations#storage pool#redirect-on-write

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