What is the ideal use case for snapshots as part of your overall data protection strategy?
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Some snapshot solutions also provide some interesting data access scenarios, where the same baseline data can be presented to multiple constituents without the doubling or tripling of storage -- NetApp FlexClone is an example. Backups, on the other hand, usually provide a longer range of retention, measured in days, weeks or months.
Use each approach for what they are designed for -- not interchangeably, but complementary. Consider adding long-distance replication and archiving to that spectrum of data protection strategies, as well.
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