Violin Systems LLC

Bill Wong

Richard Franklin Lary

A system and associated methodology for controlling block duplicates when deduplicating data (Dedup Blocks) to a storage space. The system includes a persistent database of known duplicates stored in the storage space (KD Table), and a non-persistent database of possible duplicates stored in the storage space (PD Table). Computer logic executes programming instructions stored in memory that are configured to index the KD Table according to a value derived from bits of a Dedup Block's hash signature, to index the PD Table according to another value derived by other bits of the Dedup Block's hash signature, to demote known duplicates from the KD Table to the PD Table, and to promote possible duplicates from the PD Table to the KD Table.

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Colorado Springs, CO, United States of America

Bill Wong