MAINTAINING BLOCK LEVEL SNAPSHOTS USING FREE STORAGE SPACE

A processor of a computing device is described that intercepts a write command output from a file system, the write command specifying new data to be written to a particular group of blocks of a storage device. The processor determines, based on a record of free blocks of the storage device, that th...

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Bibliographic Details
Main Authors LAWRENCE, Paul D, SALYZYN, Mark Gregory
Format Patent
LanguageEnglish
French
German
Published 14.07.2021
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A processor of a computing device is described that intercepts a write command output from a file system, the write command specifying new data to be written to a particular group of blocks of a storage device. The processor determines, based on a record of free blocks of the storage device, that the particular group of blocks of the storage device include one or more free blocks that are currently storing snapshot data as old data. Responsive to determining that the particular group of blocks of the storage device include one or more free blocks that are currently storing snapshot data as old data, the processor moves the old data to other free blocks of the storage device, and after moving the old data to the other free blocks, the processor forwards the write command to the storage device to write the new data to the particular group of blocks.
Bibliography:Application Number: EP20180793332