Abstract: Systems and methods are provided for generating a listing of equivalent snapshot objects referenced by a set of object-based snapshots representing data of a corresponding block-storage volume at a point-in-time. Generating the listing comprises: retrieving a set of main manifests corresponding to the set of object-based snapshots, retrieving a set of co-pair manifests corresponding to the set of object-based snapshots, each co-pair manifest corresponding to an object-based snapshot and including a listing of encrypted snapshot objects with equivalencies to unencrypted snapshot objects, identifying data duplication in the set of main manifests based on listings of encrypted snapshot objects with equivalencies to unencrypted snapshot objects found in the set of co-pair manifests, and removing identified data duplication in the set of main manifests.

Abstract: Techniques for consistent resource visibility during inter-cellular migrations using targeted pairwise scatter-gather techniques are described. For a paginated request to describe resources existing in cells of a provider network that match one or more criteria, a set of candidate cells having, or likely to have, resources of interest that match the one or more criteria are identified. Pairs of the candidate cells that are determined to be involved in a migration are jointly queried according to a scatter-gather type approach and aggregated via a union technique to remove duplicate resource entries. Other cells not involved in a resource migration are independently queried.