What are the factors related to the backup reduction ratio?

Question

Options

• AApplication Type
• BBackup Policy
• CRetention Policy
• DData model
• EBackup Window

• A
  78% (29)
• E
  22% (8)

Explanation

Backup reduction ratio measures how effectively backup technologies like deduplication and compression reduce the amount of data stored or transferred, and it is directly shaped by Application Type (A), Backup Policy (B), Retention Policy (C), and Data Model (D). Application type matters because different workloads - databases, virtual machines, file shares - produce data with varying compressibility and deduplication potential; a database with repetitive row structures deduplicates far better than pre-compressed video files. Backup policy determines whether full, incremental, or synthetic backups are taken, which controls how much raw data enters the backup stream and how many redundant blocks exist across backup sets to deduplicate. Retention policy governs how many backup generations are kept; longer retention windows create larger deduplication domains, allowing the engine to find and eliminate duplicate blocks across many restore points and dramatically improve the ratio. Data model affects how data is structured and stored internally, which in turn governs how well block-level or file-level deduplication algorithms can identify repeated patterns.

Backup Window (E) is incorrect because it refers only to the scheduled time frame in which backup jobs run - a capacity-planning and scheduling concern - and has no bearing on how efficiently data can be compressed or deduplicated.

Memory tip: Think of the four correct factors as describing the DATA itself (Application Type, Data Model) and the RULES governing it (Backup Policy, Retention Policy). Backup Window describes WHEN you back up, not WHAT you get back in savings.

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