File storage service system, file management device, file management method, ID denotative NAS server and file reading method

• US 7,469,260 B2
• Filed: 08/28/2003
• Issued: 12/23/2008
• Est. Priority Date: 03/19/2003
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Nakatani, Yoji, Iwasaki, Masaaki, Enko, Yutaka
• Primary Examiner(s): Alam; Hosain T
• Assistant Examiner(s): Ahn; Sangwoo
• Application Number:
  US10/653,017
• Publication Number:
  US 20040186849A1
• Time in Patent Office: 1,944 Days
• Field of Search: 709/217, 709/219, 707 1- 10, 707100-1041
• US Class Current: 1/1
• 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 according to one embodiment, 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 44 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. A file storage service system comprising:

a path denotative NAS server which is an NAS server to perform a reception of a file denotation from a client based on a file deposit location;

an ID denotative NAS server which is an NAS server to perform the reception of the file denotation from the client based on a file identifier; and

a file management device, the file management device including;

a path denotative NAS access unit which sends a read request with the file deposit location to said path denotative NAS server, and reads a file from said path denotative NAS server;

a file identifier generating unit which generates the file identifier of the file obtained by said path denotative NAS server;

a file identifier registration requesting unit which sends a file identifier registration request with the file deposit location of the file obtained by said path denotative NAS access unit and the file identifier of the file generated by said file identifier generating unit, and registers the file identifier in said ID denotative NAS server in association with the file deposit location;

a file identifier storing unit which stores information relating to the file obtained by said path denotative NAS access unit and the file identifier of the file generated by said file identifier generating unit in such a manner that the information and the file identifier are associated with each other; and

a client request receptor unit which transmits to the client, at a request from the client, the file identifier stored in the file identifier storing unit and information where the identifier and the file deposition location are corresponding to each other,

wherein when the file deposit location corresponding to the file identifier received with the read request from the client exists within said ID denotative NAS server, said ID denotative NAS server reads a file stored in the file deposit location and transmits the file to the client, and when the file deposit location corresponding to the file identifier received with the read request from the client exists within said path denotative NAS server, said ID denotative NAS server sends the read request with the file deposit location to said path denotative NAS server, reads a file from said path denotative NAS server, and sends the file to the client.

2. A file storage service system according to claim 1, wherein said file management device further comprises:

an ID denotative NAS access unit which sends a write request with the file obtained by said path denotative NAS access unit to said ID denotative NAS server, and writes the file into said ID denotative NAS server, and receives the file identifier of the file generated by said ID denotative server from said ID denotative NAS server,

wherein said file identifier storing unit stores information relating to the file obtained by said path denotative NAS access unit, and the file identifier of the file obtained by said ID denotative NAS access unit, in such a manner that the information and the file identifier are associated with each other.

3. A file storage service system according to claim 1, further comprising a user terminal, wherein said user terminal comprises:

a file information display unit which displays on a display device various information of the file within said path denotative NAS server; and

an instruction unit which receives the file denotation to allow said file management device to read the file from said path denotative NAS server, and sends a reading instruction with the file denotation to said file management device,

wherein said path denotative NAS access unit of said file management device sends to said path denotative NAS server the read request with the file deposit location of the file denoted by the reading instruction received from said user terminal.

7. A file storage service system according claim 1, wherein:

said path denotative NAS server deposits a file, dividing the file into multiple data; and

said file identifier storing unit stores said file identifier and file deposit location of said multiple data divided file specified by the file identifier, in such a manner as to be associated with each other.

4. A file management device being employed with a connection via a network to a path denotative NAS server which is an NAS server to perform a reception of a file denotation from a client based on a file deposit location, and an ID denotative NAS server which is an NAS server to perform the reception of the file denotation from the client based on a file identifier, said file management device comprising:

a path denotative NAS access unit which sends a read request with the file deposit location to said path denotative NAS server, and reads a file from said path denotative NAS server;

a file identifier generating unit which generates the file identifier of the file obtained by said path denotative NAS server;

a file identifier registration requesting unit which sends a file identifier registration request with the file deposit location of the file obtained by said path denotative NAS access unit and the file identifier of the file generated by said file identifier generating unit, and registers the file identifier in said ID denotative NAS server in association with the file deposit location;

a file identifier storing unit which stores information relating to the file obtained by said path denotative NAS access unit and the file identifier of the file generated by said file identifier generating unit in such a manner that the information and the file identifier are associated with each other; and

a client request receptor unit which transmits, at a request from the client, the file identifier stored in the file identifier storing unit and information where the identifier and the file deposit location are corresponding to each other to the client, so that when the file deposit location corresponding to the file identifier received with the read request from the client exists within said ID denotative NAS server, said ID denotative NAS server reads a file stored in the file deposit location and transmits the file to the client, and when the file deposit location corresponding to the file identifier received with the read request from the client exists within said path denotative NAS server, said ID denotative NAS server sends the read request with the file deposit location to said path denotative NAS server, reads a file from said path denotative NAS server, and sends the file to the client.

8. A file storage service system according claim 4, wherein:

said path denotative NAS server deposits a file, dividing the file into multiple data; and

said file identifier storing unit stores said file identifier and file deposit location of said multiple data divided file specified by the file identifier, in such a manner as to be associated with each other.

5. A computer-readable medium storing a program which is readable by a computer, wherein said computer is employed with a connection via a network to a path denotative NAS server which is an NAS server to perform a reception of a file denotation from a client based on a file deposit location, and an ID denotative NAS server which is an NAS server to perform the reception of the file denotation from the client based on a file identifier, said program comprising:

code for sending a read request with the file deposit location to said path denotative NAS server, and reading a file from said path denotative NAS server;

code for generating the file identifier of the file obtained by said path denotative NAS server;

code for sending a file identifier registration request with the file deposit location of the file obtained by said path denotative NAS access unit and the file identifier of the file generated by said file identifier generating unit, and registering the file identifier in said ID denotative NAS server in association with the file deposit location;

code for storing information relating to the file obtained by said path denotative NAS access unit and the file identifier of the file generated by said file identifier generating unit in such a manner that the information and the file identifier are associated with each other; and

code for transmitting, at a request from the client, the file identifier stored in the file identifier storing unit and information where the identifier and the file deposit location are corresponding to each other to the client, so that when the file deposit location corresponding to the file identifier received with the read request from the client exists within said ID denotative NAS server, said ID denotative NAS server reads a file stored in the file deposit location and transmits the file to the client, and when the file deposit location corresponding to the file identifier received with the read request from the client exists within said path denotative NAS server, said ID denotative NAS server sends the read request with the file deposit location to said path denotative NAS server, reads a file from said path denotative NAS server, and sends the file to the client.

9. A computer-readable medium according claim 5, further comprising:

code for depositing a file by said path denotative NAS server, dividing the file into multiple data; and

code for storing said file identifier and file deposit location of said multiple data divided file specified by the file identifier, in such a manner as to be associated with each other.

6. A file management method employing a computer, with a connection via a network to a path denotative NAS server which is an NAS server to perform a reception of a file denotation from a client based on a file deposit location, and an ID denotative NAS server which is an NAS server to perform the reception of the file denotation from the client based on a file identifier, said file management method comprising:

sending a read request with the file deposit location to said path denotative NAS server and reading the file from said path denotative NAS server;

generating the file identifier of the file thus obtained;

sending a file identifier registration request with the file deposit location of the file thus obtained and the file identifier of the file generated, and registering the file identifier in said ID denotative NAS server in association with the file deposit location;

storing in a storage device, information relating to the file thus obtained and the file identifier of the file generated, in such a manner that the information and the file identifier are associated with each other; and

transmitting, at a request from the client, the file identifier stored in the file identifier storing unit and information where the identifier and the file deposit location are corresponding to each other to the client, so that when the file deposit location corresponding to the file identifier received with the read request from the client exists within said ID denotative NAS server, said ID denotative NAS server reads a file stored in the file deposit location and transmits the file to the client, and when the file deposit location corresponding to the file identifier received with the read request from the client exists within said path denotative NAS server, said ID denotative NAS server sends the read request with the file deposit location to said path denotative NAS server, reads a file from said path denotative NAS server, and sends the file to the client.