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:
Oct. 23, 2018
Filed:
Feb. 04, 2015
Amazon Technologies, Inc., Seattle, WA (US);
Allan Henry Vermeulen, Corvallis, OR (US);
Matteo Frigo, Acton, MA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
A metadata manager of a file system receives a directory move request, indicating a source directory (SD) and a proposed parent directory (PPD). Each directory in the directory tree is assigned a respective move rank (MR) in accordance with a rank-order preserving rule. The metadata manager checks whether the MR of the SD or the PPD is to be changed to avoid violating the rule. If an MR change is required, one or more directory-pair operations are implemented to determine whether the move can be successfully completed. In each directory-pair operation, the MRs of a pair of directories is examined and an attempt is made to modify one of the MRs of the pair in accordance with the rule. If enough MRs can be changed, the move is completed by adding the SD as a child of the PPD.