Technique for improving operations log indexing

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United States of America Patent

PATENT NO 11983438
APP PUB NO 20220253243A1
SERIAL NO

17218766

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Abstract

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A technique improves implementation of an index for an operations log (oplog) that coalesces random write operations directed to a virtual disk (vdisk) stored on an extent store. The oplog temporarily caches data associated with the random write operations (i.e., write data) as well as metadata describing the write data. The metadata includes descriptors to the write data stored on virtual address regions, i.e., offset ranges, of the vdisk and are used to identify the offset ranges of write data for the vdisk that are cached in the oplog. To facilitate fast lookup operations of the offset ranges when determining whether write data is cached in the oplog, an oplog index provides a state of the latest data for offset ranges of the vdisk. The technique improves implementation of the oplog index by storing the oplog index in storage class memory, such as persistent memory, to obviate failure and subsequent recovery of the oplog index.

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Patent Owner(s)

Patent OwnerAddress
NUTANIX INC1740 TECHNOLOGY DRIVE SUITE 150 SAN JOSE CA 95110

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kataria, Alok Nemchand Maharashtra, IN 20 92
Memon, Tabrez Parvez Campbell, US 13 34
Pendharkar, Niranjan Sanjiv Maharashtra, IN 14 66
Shukla, Shubham Bhopal, IN 7 14
Wyckoff, Pete Durham, US 4 16

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