1. A non-transitory computer-readable device storing computer-executable instructions that when executed by a computer cause the computer to perform a method, the method comprising: accessing a first deduplication blocklet repository that was created by deduplicating a first data stream as controlled by a first set of deduplication parameters; accessing a third deduplication blocklet repository that was created by deduplicating a second, different data stream as controlled by a third set of deduplication parameters; and creating a second, different deduplication blocklet repository by deduplicating the first blocklet repository and the third blocklet repository, where deduplicating the first blocklet repository and the third blocklet repository are controlled by a second, different set of deduplication parameters.