Cloud-based distributed data storage system using block-level deduplication based on backup frequencies of incoming backup copies

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United States of America Patent

PATENT NO 11500566
SERIAL NO

17153674

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Abstract

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Disclosed deduplication techniques at a distributed data storage system guarantee that space reclamation will not affect deduplicated data integrity even without perfect synchronization between components. By understanding certain “behavioral” characteristics and schedule cadences of backup operations that generate backup copies received at the distributed data storage system, data blocks that are not re-written by subsequent backup copies are pro-actively aged, while promoting continued retention of data blocks that are re-written. An expiry scheme operates with block-level granularity. Each unique deduplicated data block is given an expiry timeframe based on the block's arrival time at the distributed data storage system (i.e., when a backup copy supplies the block) and further based on backup frequencies of the various virtual disks referencing a unique system-wide identifier of the block, which is based on the block's hash value. Communications between components are kept to an as-needed basis. Cloud-based and multi-cloud configurations are disclosed.

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Patent Owner(s)

  • COMMVAULT SYSTEMS, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lakshman, Avinash Fremont, US 48 783
Naik, Bharat Pundalik Palo Alto, US 6 21
Wang, Xiangyu Fremont, US 64 438

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