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:
Aug. 31, 2021
Filed:
Jan. 30, 2015
Hitachi, Ltd., Tokyo, JP;
Masanori Takata, Tokyo, JP;
Akiyoshi Tsuchiya, Tokyo, JP;
Hitoshi Kamei, Tokyo, JP;
Hitoshi Arai, Tokyo, JP;
Yoji Nakatani, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Each file storage apparatus of a plurality of file storage apparatuses stores a file system, and associates and stores paths of elements in the file system and archive destinations of the elements in an archive storage apparatus. When the file system is operated, each file storage apparatus transmits archive data of an element as an operation target, and operation information including operation details to the archive storage apparatus. The archive storage apparatus receives the archive data and the operation information, stores the archive data, and stores consistency information including the operation information and archive versions indicating a reception order of the operation information. A first file storage apparatus executes a synchronization process of acquiring the consistency information from the archive storage apparatus, correcting inconsistency between the acquired consistency information and consistency information including archive versions earlier than the acquired consistency information, and reflecting the file system on the consistency information.