Erasure coding repair availability

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11656962
APP PUB NO 20220229749A1
SERIAL NO

17657786

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Distributed storage systems frequently use a centralized metadata repository that stores metadata in an eventually consistent distributed database. However, a metadata repository cannot be relied upon for determining which erasure coded fragments are lost because of a storage node(s) failures. Instead, when recovering a failed storage node, a list of missing fragments is generated based on fragments stored in storage devices of available storage nodes. A storage node performing the recovery sends a request to one or more of the available storage nodes for a fragment list. The fragment list is generated, not based on a metadata database, but on scanning storage devices for fragments related to the failed storage node. The storage node performing the recovery merges retrieved lists to create a master list indicating fragments that should be regenerated for recovery of the failed storage node(s).

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Patent Owner(s)

  • NETAPP, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sangamkar, Dheeraj Raghavender Vancouver, CA 19 175
Vairavanathan, Emalayan Vancouver, CA 24 288
Yoon, Song Guen Coquitlam, CA 11 40

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