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:
May. 22, 2007
Filed:
Jun. 30, 2003
Sanjay Ghemawat, Mountain View, CA (US);
Howard Gobioff, San Francisco, CA (US);
Shun-tak Leung, Mountain View, CA (US);
Sanjay Ghemawat, Mountain View, CA (US);
Howard Gobioff, San Francisco, CA (US);
Shun-Tak Leung, Mountain View, CA (US);
Google Inc., Mountain View, CA (US);
Abstract
A system may perform a first operation within a file system in which directories and files are organized as nodes in a namespace tree. The system may associate a read-write lock with each of the nodes in the namespace tree. The system may acquire a first lock on a name of one or more directories involved in the first operation, acquire a second lock on an entire pathname involved in the first operation, determine whether the first lock or the second lock conflicts with third locks acquired by a second operation, and perform the first operation when the first lock or the second lock does not conflict with the third locks. The first, second, and third locks may include read-write locks.