QuestionQ4

Data Protection Coursework

A customer needs to protect a 100GB VM using a 24-hour journal.

Given the following characteristics:

  • VM size: 100 GB
  • Rate of change: 20%
  • Compression: 50%

How much storage is required at the target site to provide this protection?

  • A 100 GB
  • B 110 GB
  • C 120 GB
Explanation

Target-site storage consists of the replica VM disk (equal to the source VM size, 100 GB) plus the journal storage needed to retain 24 hours of changes. The daily rate of change (20%) applied to the 100 GB VM yields 20 GB of changed data per day; after applying 50% compression, the journal requires 10 GB. Adding this to the 100 GB replica gives a total of 110 GB of required target-site storage.

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