File Storage Service System, File Management Device, File Management Method, ID Denotative NAS Server and File Reading Method

• US 20120290641A1
• Filed: 05/21/2012
• Published: 11/15/2012
• Est. Priority Date: 03/19/2003
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Enko, Yutaka, Iwasaki, Masaaki, Nakatani, Yoji
• Granted Patent: US 8,700,573 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: G06F 16/10 File systems; File servers
• CPC Class Codes: G06F 16/119 Details of migration of file systems migration mechanisms in storage systems G06F3/0647
• CPC Class Codes: Y10S 707/99933 Query processing, i.e. searching
• CPC Class Codes: Y10S 707/99943 Generating database or data structure, e.g. via user interface

Abstract

The present invention relates to a migration of a file from a path denotative NAS server to an ID denotative NAS server. In a file management device a migration-use path denotative NAS access section obtains a file deposit location from the path denotative NAS server, selects a migration target file based on the deposit location, and sends a read request with the deposit location of the migration target file to the path denotative NAS server, so as to obtain the migration target file. A migration-use denotative NAS access section generates a write request with the migration target file, sends it to the ID denotative NAS servers, and writes the file therein. In addition, the migration-use ID denotative NAS access section registers a GUID received from the ID denotative NAS servers in a file name/GUID management table, together with the file name of the migration target file.

Claims

1-14. -14. (canceled)

15. A system comprising:

a first file server for managing a plurality of files and receiving an access request with a location which designates one of the files therein, (FIG. 6;

3)

a second file server for managing a plurality of files and receiving an access request with an ID which designated on of the files therein, the second file server being coupled to the first file server and a client, (FIG. 6;

2)

a file management device for migrating the files in the first file server to the second file server, the file management device being coupled to the first and the second file server, and the client, (FIG. 6;

4)

wherein, the file management device is configured to, in advance of the migration, obtain locations of the files in the first file server, generate an ID for each of the files in the first file server, send registration requests with the generated IDs and to obtained locations of the files in the first server to the second file server, and send the generated IDs to the client, (FIG. 7, [0076]-[0083])

wherein, the second file server is configured to, in response to the registration request, store information which indicates corresponding relationship between each of the IDs and each of the locations of the files in the first file servers, (FIG. 7)

wherein, the second file server is configured to, in response to a read request with an ID from the client, determine whether a file designated by the ID exists in the first file server or the second file server based on the information, and if the designated file exists in the first file server, obtain a location corresponding to the designated ID from the information, send a read request with the corresponding location to the first file server, and send the received file to the client. (FIG. 8)