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:
Jun. 27, 2023
Filed:
Mar. 24, 2022
Hitachi, Ltd., Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A file storage system configured to use a second storage system includes a first file system provided to an application, a first storage system in which a file is stored by the first file system, a processor, state management information storing a state of the file, a state information management unit that manages the state management information, and a file virtualization unit that manages files stored in the first storage system and the second storage system. The processor performs a calling process of the first file system based on an operation request of the file from the application. The first file system processes the operation request of the file. The state information management unit performs a state management information update process of the file based on input information with respect to the first file system related to the operation request, or an operation content.