Block level tagging with file level information
US8140537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2009 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Jul 14, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments for data tagging in a computing environment are provided. A write operation in an operating system (OS) file system level storage layer is intercepted. A set of signatures in a sub-chunk level is calculated. The set of signatures are aligned to the beginning of an OS file system-level object and stored in a memory location, such as a cache, along with file system information relating to the write operation and to the file system-level object that the data is written into. Following file system processing, and as the data is written into storage in blocks, the write operation is intercepted in the block level storage layer. A secondary set of signatures in a sub-block level is calculated using a common algorithm used to create the original set of signatures. The sets of signatures are compared against each other, and blocks of the data having matching signatures are tagged with the file system information stored in the memory location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.