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

A non-transitory machine readable medium comprising instructions for performing a method, which when executed by a machine, causes the machine to:

• determine 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;
• remove 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;
• determine 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;
• evaluate 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
• transmit an object, comprising data of the deduplicated set of changed block numbers, to the object store for storage as a new copied snapshot.

A computing device comprising:

• a memory comprising machine executable code for performing a method;
• and
• a processor coupled to the memory, the processor configured to execute the machine executable code to cause the processor to:
• determine a list of deallocated block numbers of primary storage of the computing device based upon a difference between a first snapshot and a second snapshot of the primary storage;
• remove 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;
• determine 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;
• evaluate 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
• transmit an object, comprising data of the deduplicated set of changed block numbers, to the object store for storage as a new copied snapshot.