SY0-501 Question #170: Real Exam Question with Answer & Explanation

Question

The data backup window has expanded into the morning hours and has begun to affect production users. The main bottleneck in the process is the time it takes to replicate the backups to separate severs at the offsite data center. Which of the following uses of deduplication could be implemented to reduce the backup window?

Options

• AImplement deduplication at the network level between the two locations
• BImplement deduplication on the storage array to reduce the amount of drive space needed
• CImplement deduplication on the server storage to reduce the data backed up
• DImplement deduplication on both the local and remote servers

Explanation

To reduce the backup replication bottleneck, implementing deduplication on the primary storage array significantly decreases the amount of data that needs to be transferred to the offsite data center.

Common mistakes.

• A. Implementing deduplication at the network level typically refers to WAN optimization techniques, which apply during transit, rather than reducing the actual amount of data stored or prepared for replication from its source on the storage array.
• C. Implementing deduplication on the server storage would reduce the size of the initial backups, but the bottleneck is specified as the 'replication of the backups,' implying the backups are already created and the issue is transferring them.
• D. Implementing deduplication on 'both local and remote servers' is too vague and doesn't directly target the bottleneck of replicating the backups themselves from a consolidated backup target (like a storage array) to an offsite location.

Concept tested. Data deduplication for backup and replication optimization

Reference. https://learn.microsoft.com/en-us/windows-server/storage/data-deduplication/overview

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