US Patent 10031675 Method and system for tiering data

Example embodiments of the present invention relate to a method, a system, and a computer program product for data storage tiering. The method includes maintaining data in a data storage system having a plurality of tiers, determining a subset of the data stored in a first, more-durable tier should be stored in a second, less-durable tier, and tiering the subset of the data from the first, more-durable tier to the second, less-durable tier.