OPTIMIZING DEDUPLICATION HIT-RATE IN A REMOTE COPY ENVIRONMENT

A method, system, computer program product and computer program for managing a storage system, comprising a primary system and a backup system, wherein the backup system is in a copy relationship with the primary system, comprising: in response to a write operation, the write operation comprising fi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Chandra, Anuj, Imtiaz, Imran, Mulholland, Miles
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A method, system, computer program product and computer program for managing a storage system, comprising a primary system and a backup system, wherein the backup system is in a copy relationship with the primary system, comprising: in response to a write operation, the write operation comprising first data: calculating a cryptographic value for the first data; scanning a first directory to identify an entry corresponding to the cryptographic value to determine a first set of addresses associated with the write operation; transmitting the first set of addresses to the backup system; and updating the first directory with a first entry for the write operation, the first entry comprising a pointer to the first set of addresses; updating a second directory with a second entry for the write operation, the second entry comprising a pointer to a second set of addresses corresponding to the first set of addresses.