Optimizing deduplication hit-rate in a remote copy environment
A storage system has a primary storage system and a backup storage system. When the storage system receives a write of data, the primary storage system calculates a hash or fingerprint value of the data to be written using a cryptographic function 202. It then scans a directory of hash values and ad...
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| creator | Imran Imtiaz Miles Mulholland Anuj Chandra |
| description | A storage system has a primary storage system and a backup storage system. When the storage system receives a write of data, the primary storage system calculates a hash or fingerprint value of the data to be written using a cryptographic function 202. It then scans a directory of hash values and addresses of data written to the first storage system 204. If an entry is found 206, the address associated with the hash is sent to the backup system 214 and the address at which the data is to be written is added to the entry in the directory 216, 218. The backup system updates its directory with the addresses received from the primary system. If an entry is not found 206, the primary system writes it to its storage medium 208, transmits the data to the backup system 210 and adds an entry for the hash and target address of the data to the directory 216, 218. The backup system updates its directory and writes the data. |
| format | Patent |
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| subjects | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS |
| title | Optimizing deduplication hit-rate in a remote copy environment |
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