Recovering a file system to any point-in-time in the past with guaranteed structure, content consistency and integrity
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United States of America Patent
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Mar 6, 2012
Issued Date -
N/A
app pub date -
Mar 31, 2008
filing date -
Mar 30, 2007
priority date (Note) -
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Abstract
A data management system (DMS) includes a continuous real-time object store that captures all real-time activities, with associated object metadata information. The DMS is capable of reintroducing any point-in-time view of data ranging from a granular object to an entire file system. A set of algorithms (for creation of a file or directory, modification of a file or directory, deletion of a file or directory, and relocation/renaming of a file or directory) are used to generate and maintain a file system history in the DMS and to ensure that a latest version of a directory always refers to a latest version of its children until the directory changed. Any point-in-time recovery is implemented using the file system history in one of various ways to provide strong individual file integrity, exact point-in-time crash consistency, and/or recovery of last version of all files in the file system.
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