What is 'storage tiering' in cloud cost optimization, and which data access patterns benefit MOST from it?
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A
Storage tiering uses cheaper storage classes (e.g., S3 Glacier, Nearline) for infrequently accessed data while keeping frequently accessed data in faster, more expensive storage — most beneficial for large datasets with clear hot/cold access patterns
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B
Storage tiering replicates data across multiple storage tiers simultaneously to improve read performance through parallel access
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C
Storage tiering is a backup strategy that stores multiple versions of data in different geographic regions for DR purposes
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D
Storage tiering reduces storage costs by compressing all data before storing it, with the compression ratio determining the tier