Patents by Inventor Alvis Lin

Alvis Lin 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).

  • Snapshot facility allowing preservation of chronological views on block drives
    Patent number: 7055010
    Abstract: A method for efficiently maintaining snapshot instances. To maintain the state of snapshot instances, the snapshot copies the data needed to be protected into free space on the same volume. In order to identify whether a block is free, a snapshot record is created for each block on a volume to record write operations on the block. With these snapshot records, the allocation status of blocks on a volume can quickly be identified. Free space allocation is then accomplished by allocating free space via the file-system provided interface and identifying it with snapshot records. With this mechanism, snapshot software can allocate free space to store snapshot metadata and “copy-to-write” data dynamically.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: May 30, 2006
    Assignee: Synology Inc.
    Inventors: Alvis Lin, Cheen Liao
  • Snapshot facility allowing preservation of chronological views on block drives
    Publication number: 20040093474
    Abstract: A method for efficiently maintaining snapshot instances. To maintain the state of snapshot instances, the snapshot copies the data needed to be protected into free space on the same volume. In order to identify whether a block is free, a snapshot record is created for each block on a volume to record write operations on the block. With these snapshot records, the allocation status of blocks on a volume can quickly be identified. Free space allocation is then accomplished by allocating free space via the file-system provided interface and identifying it with snapshot records. With this mechanism, snapshot software can allocate free space to store snapshot metadata and “copy-to-write” data dynamically.
    Type: Application
    Filed: November 3, 2003
    Publication date: May 13, 2004
    Inventors: Alvis Lin, Cheen Liao