Importance

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Abstract

In an implementation, a set of files are stored into a collection of blocks. The collection of blocks are stored within a storage subsystem that includes a premium storage area and a low-end storage area, wherein the premium storage area has a performance metric that is better than a performance metric of the low-end storage area. The collection of blocks define the set of files at multiple different times within the predefined time window, the collection of blocks include a first baseline of blocks which defines the set of files at a first baseline time within a predefined time window, older blocks which were formed before the first baseline time, and newer blocks which were formed after the first baseline time. The first baseline of blocks and the newer blocks are stored in the premium storage area and the older blocks are stored in the low-end storage area.

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First Claim