Preserving past states of file system nodes
US9747317B2 · kind B2 · utility
1Cited by
7References
26Claims
0Family size
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Key dates
| Filing date | Apr 21, 2015 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Jul 26, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/9017
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A selective tuple versioning is used on a files system for preserving past states of file system nodes by adding a bitmap to a row for a node within a file system table for preserving the past state of the node in a file system, receiving a request for updating the node along with a node identification (ID) and associated attributes of the node needing to be updated, generating a second time value indicating the time of the updating, and duplicating the row for the node into a new row in the file system table with an end time set equal to the second time value if the bit in the bitmap for the node is set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.