A company is running an application on premises and wants to use AWS for data backup. All of the data must be available locally. The backup application can write only to block-based storage that is…

Question

Options

• AConfigure the backup software to use Amazon S3 as the target for the data backups.
• BConfigure the backup software to use Amazon S3 Glacier Flexible Retrieval as the target for the
• CUse AWS Storage Gateway, and configure it to use gateway-cached volumes.
• DUse AWS Storage Gateway, and configure it to use gateway-stored volumes.

• A
  12% (6)
• B
  4% (2)
• C
  6% (3)
• D
  78% (40)

Explanation

The Storage Gateway service enables hybrid cloud backup by presenting local block storage that synchronizes with AWS cloud storage. For scenarios where all data must remain available locally while still backed up to AWS, the correct mode is gateway-stored volumes. "Use stored volumes if you want to keep all your data locally while asynchronously backing up point-in-time snapshots to Amazon S3 for durable storage." These volumes expose an iSCSI interface compatible with POSIX file systems, allowing direct use by on-premises backup software. Gateway-cached volumes (Option C) store primary data in AWS with limited local cache, violating the "all data must be available locally" requirement. Options A and B are object-based storage solutions, not compatible with POSIX or block-based backup applications. Therefore, Option D fully satisfies CloudOps reliability and continuity best practices by ensuring local availability, cloud durability, and POSIX compatibility for backups.

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