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Question 127 - NCP-MCI-6.5 discussion

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Which algorithm do snapshots and clones leverage to maximize efficiency and effectiveness?

A.
Continuous Data Protection
Answers
A.
Continuous Data Protection
B.
Copy-on-Write
Answers
B.
Copy-on-Write
C.
Split-mirror
Answers
C.
Split-mirror
D.
Redirect-On-Write
Answers
D.
Redirect-On-Write
Suggested answer: B

Explanation:

According to the Dell Unity: Data Reduction Technical White Paper1, snapshots and clones on Dell Unity use the Copy-on-Write (CoW) algorithm to maximize efficiency and effectiveness. CoW is a technique that defers the copying of data until it is modified. This means that snapshots and clones only consume space when changes are made to the source or the clone, respectively. CoW also preserves the original data in case of a rollback or recovery operation.

asked 23/09/2024
Krzysztof Dyrdal
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