Eliminate unnecessary data from your production storage. This typically involves moving the unnecessary data to...
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a different tier or deleting the data entirely. Use information lifecycle management (ILM) and data retention policies to identify and eliminate old or unneeded data. We can come up with all kinds of schemes to manage, store and deduplicate data, but ultimately it's all about making key decisions -- what data to keep, what data is needed by the business and where that data should be stored (e.g., tiers).
Regardless of the platforms or products, you cannot count on technology to make the retention/deletion decisions for you. Make the decisions first at the corporate policy-making level, and then use technology to enforce and assist you with those decisions.
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