1. A computer program product for snapshot management in a storage infrastructure, the computer program product comprising: one or more computer readable storage media and program instructions stored on the one or more computer readable storage media, the program instructions comprising: program instructions to access a first layer of the storage infrastructure, wherein accessing the first layer of the storage infrastructure includes identifying at least a first snapshot captured in a first layer of the storage infrastructure as well as metadata related to the first snapshot; program instructions to access a separate second layer of the storage infrastructure, wherein accessing the separate second layer of the storage infrastructure includes identifying at least a second snapshot captured in a second layer of the storage infrastructure as well as metadata related to the second snapshot; program instructions to produce a determination that the first snapshot in the first layer of the storage infrastructure is a duplicate of the second snapshot in the separate second layer of the storage infrastructure based at least in part on the metadata related to the first snapshot and the metadata related to the second snapshot; and program instructions to remove the first snapshot in the first layer of storage infrastructure from the first layer of the storage infrastructure responsive to the determination.