Data deduplication using crc-seed differentiation between data and stubs

A system for differentiating between data and stubs pointing to a parent copy of deduplicated data, comprising:

• at least one processor device operable in a computing storage environment, wherein the at least one processor device is adapted for:
• storing undeduplicated data with a first cyclic redundancy check (CRC) seed,
• storing a stub pointing to the parent copy of the deduplicated data with a second CRC seed, and
• subsequent to reading the deduplicated data, associating the first CRC seed with the undeduplicated data, and associating the second CRC seed with the stub.

A computer program product for differentiating between data and stubs pointing to a parent copy of deduplicated data using a processor device, the computer program product comprising a computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:

• a first executable portion for storing undeduplicated data with a first cyclic redundancy check (CRC) seed;
• a second executable portion for storing a stub pointing to the parent copy of the deduplicated data with a second CRC seed;
• and
• a third executable portion for, subsequent to reading the deduplicated data, associating the first CRC seed with the undeduplicated data, and associating the second CRC seed with the stub.

A method for differentiating between data and metadata using a processor device, comprising:

• storing the data with a first cyclic redundancy check (CRC) seed;
• storing metadata associated with the data with a second CRC seed;
• and
• subsequent to reading the data, associating the first CRC seed with the data, and associating the second CRC seed with the metadata.