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. 08, 2013
Filed:
May. 26, 2011
Yingchao Zhou, Beijing, CN;
Wei Kang, Beijing, CN;
Weigang Zhong, Beijing, CN;
Chen Gong, Beijing, CN;
Kevin Xu, Warren, NJ (US);
Sitaram Pawar, Shrewsbury, MA (US);
Yingchao Zhou, Beijing, CN;
Wei Kang, Beijing, CN;
Weigang Zhong, Beijing, CN;
Chen Gong, Beijing, CN;
Kevin Xu, Warren, NJ (US);
Sitaram Pawar, Shrewsbury, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
An online tree quota check tool computes quota usage of files in a directory tree while the structure of the directory tree keeps changing due to concurrent write access by other applications and clients. The quota check tool computes the quota usage without interfering with the ongoing file access operations that change the directory content and quota usage. A quota check database keeps track of which files have been checked and which have not, so that each file is checked and its quota usage is accumulated once and only once while directories are moved and directory scans are restarted as a result of the changing directory content. File system operations are modified to synchronize with the online tree quota check. The quota check tool can be single threaded or multi-threaded. A multi-threaded tool dispatches idle directory iteration threads to scan subdirectories in the directory tree.