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Transferring snapshot copy to object store with deduplication preservation and additional compression

  • US 10,852,976 B2
  • Filed: 03/08/2019
  • Issued: 12/01/2020
  • Est. Priority Date: 03/08/2019
  • Status: Active Grant
First Claim
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1. A method comprising:

  • determining a list of deallocated block numbers of primary storage of a computing device based upon a difference between a first snapshot and a second snapshot of the primary storage;

    removing entries for the list of deallocated block numbers from a mapping metafile that maps block numbers of the primary storage to cloud block numbers of data stored within objects of an object store;

    determining a list of changed block numbers corresponding to changes between a current snapshot of the primary storage and a prior copied snapshot copied from the primary storage to the object store;

    evaluating the mapping metafile using the list of changed block numbers to identify a deduplicated set of changed block numbers without entries within the mapping metafile; and

    transmitting an object, comprising data of the deduplicated set of changed block numbers, to the object store for storage as a new copied snapshot.

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