Which statement best describes the impact of compacting on full backup file performance?

Which statement best describes the impact of compacting on full backup file performance?

• A. It reduces the file size and increases write and read speed.
• B. It increases the file size and slows performance.
• C. It has no impact on size but improves compression.
• D. It breaks compatibility with older tape libraries.

Answer: (A)

Compacting a full backup file reclaims unused space inside the backup container, so the file becomes smaller. With a smaller file, there are fewer bytes to read or write, which generally means higher throughput for backup, restore, and transfer operations. The slight overhead of performing the compaction is upfront, but once the process is done, ongoing performance improves because future I/O touches less data. The other statements don’t fit because compacting actually reduces size, doesn’t primarily affect compression in this context, and isn’t about compatibility with tape libraries.

Compacting a full backup file reclaims unused space inside the backup container, so the file becomes smaller. With a smaller file, there are fewer bytes to read or write, which generally means higher throughput for backup, restore, and transfer operations. The slight overhead of performing the compaction is upfront, but once the process is done, ongoing performance improves because future I/O touches less data. The other statements don’t fit because compacting actually reduces size, doesn’t primarily affect compression in this context, and isn’t about compatibility with tape libraries.