Patents by Inventor Cornel Rat

Cornel Rat has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Online repair of metadata for structured data including file systems
    Patent number: 10733045
    Abstract: Embodiments described herein relate to testing the integrity of a storage system's metadata while corresponding structured data remains online. Embodiments also relate to enabling corrupt storage system metadata to be repaired while the metadata remains in use and while its structured data remains online. Corruption detection and repair is described with respect to allocation metadata and reference count metadata. The embodiments are applicable to many types of storage systems, including file systems and databases, for example.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: August 4, 2020
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Cornel Rat, Chesong Lee, Rajsekhar Das
  • File system with per-extent checksums
    Patent number: 10102218
    Abstract: A file system allows a different checksum algorithm to be used for different extents of a file system object independently of other extents of the file system object. The checksum algorithm can be a selectable attribute of an extent or range of extents of a file system object, such that some extents of a file system object can use a first checksum algorithm, while other extents of the file system object can use a second checksum algorithm. An extent of the file system object also may have no associated checksum algorithm. The file system stores, for each extent of a file system object, data indicating a checksum for the extent and an indication of any checksum algorithm used for the extent.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: October 16, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Chesong Lee, Raj Das, Cornel Rat, William Tipton
  • ONLINE REPAIR OF METADATA FOR STRUCTURED DATA INCLUDING FILE SYSTEMS
    Publication number: 20180018218
    Abstract: Embodiments described herein relate to testing the integrity of a storage system's metadata while corresponding structured data remains online. Embodiments also relate to enabling corrupt storage system metadata to be repaired while the metadata remains in use and while its structured data remains online. Corruption detection and repair is described with respect to allocation metadata and reference count metadata. The embodiments are applicable to many types of storage systems, including file systems and databases, for example.
    Type: Application
    Filed: September 27, 2016
    Publication date: January 18, 2018
    Inventors: Cornel Rat, Chesong Lee, Rajsekhar Das
  • FILE SYSTEM WITH PER-EXTENT CHECKSUMS
    Publication number: 20160092467
    Abstract: A file system allows a different checksum algorithm to be used for different extents of a file system object independently of other extents of the file system object. The checksum algorithm can be a selectable attribute of an extent or range of extents of a file system object, such that some extents of a file system object can use a first checksum algorithm, while other extents of the file system object can use a second checksum algorithm. An extent of the file system object also may have no associated checksum algorithm. The file system stores, for each extent of a file system object, data indicating a checksum for the extent and an indication of any checksum algorithm used for the extent.
    Type: Application
    Filed: September 30, 2014
    Publication date: March 31, 2016
    Inventors: Chesong Lee, Raj Das, Cornel Rat, William Tipton