The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2008
Filed:
Mar. 08, 2005
Bruce W. Leverett, Pittsburgh, PA (US);
Richard P. Jernigan, Iv, Ambridge, PA (US);
Jason S. Bertschi, Pittsburgh, PA (US);
Narayana R. Tummala, Gibsonia, PA (US);
Bruce W. Leverett, Pittsburgh, PA (US);
Richard P. Jernigan, IV, Ambridge, PA (US);
Jason S. Bertschi, Pittsburgh, PA (US);
Narayana R. Tummala, Gibsonia, PA (US);
Network Appliance, Inc., Sunnyvale, CA (US);
Abstract
A technique for accelerating the creation of a hyperclone of a virtual file system. A hyperclone inode is copied from the base inode. Each indirect and direct block referenced by the base inode is also copied and the block pointers within the base inode are set to reference the copied direct data blocks. A CTW bit is set within each copied block that alerts the file system that the reference indirect or direct block is not to be deallocated.