A company is revising its backup policy and wants to ensure long-term retention of its most critical data while also maintaining the ability to recover from more recent data losses. Which of the following backup rotation schemes would BEST suit this requirement?
The Grandfather-father-son (GFS) backup rotation scheme is ideal for long-term data retention while also providing a method for more recent data recoveries. This scheme incorporates multiple generations of backups (daily, weekly, monthly), making it suitable for the company's needs as it ensures that there are several restore points available that extend back over a longer period. A full backup is kept as the 'grandfather,' which is the oldest backup, while progressively more recent backups are labeled as 'father' and 'son.' Daily (son) and weekly (father) backups provide recovery options for short-term incidents, whereas the monthly (grandfather) backups provide long-term data retention.
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What exactly is the Grandfather-Father-Son (GFS) backup rotation scheme?
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How do incremental and differential backups differ from the GFS scheme?
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Why is long-term data retention important for a company's backup policy?