STORAGE SYSTEM AND DATA MANAGEMENT METHOD IN STORAGE SYSTEM

• US 20120271934A1
• Filed: 07/03/2012
• Published: 10/25/2012
• Est. Priority Date: 12/27/2007
• Status: Active Grant

• Current Assignee: Akira Yamamoto, Kiyotake Kumazawa, Masaaki Iwasaki, Naoko Iwami, Shoji Kodama
• Original Assignee: Akira Yamamoto, Kiyotake Kumazawa, Masaaki Iwasaki, Naoko Iwami, Shoji Kodama
• Inventors: IWAMI, Naoko, Kumazawa, Kiyotake, Yamamoto, Akira, Iwasaki, Masaaki, Kodama, Shoji
• Granted Patent: US 8,775,600 B2
• Time in Patent Office: Days
• US Class Current: 709/223
• CPC Class Codes: G06F 16/489 using time information

Abstract

Provided is a storage center including a storage subsystem for storing content data to be used by the user'"'"'s home server, and a center server for controlling the storage subsystem. The center server aggregates the content recording reservation requests sent from several home servers, obtains content data from a content server and stores the content data in the storage subsystem at a designated recording start time, and notifies the user'"'"'s home server that the recording reservation is complete.

Claims

1. A computer system comprising:

a server having a first storage area;

a storage center coupled to the server, and having a second storage area,

wherein when the server stores first data in the first storage area, the first storage area having a remaining capacity that is not sufficient to store the first data, if there is any data stored in both the first storage area in the server and the second storage area in the storage center, the server deletes second data stored in the first storage area to secure a storage area for storing the first data in the first storage area, the first data being included in the data stored in both the first storage area in the server and the second storage area, and

wherein when the server stores first data in the first storage area, the first storage area having a remaining capacity that is not sufficient to store the first data, if there is no data stored in both the first storage area in the server and the second storage area in the storage center, the server transfers third data to the storage center and deletes the second data stored in the first storage area to secure the storage area for storing the first data in the first storage area.

2. A computer system according to claim 1, wherein the first data, the second data, and the third data are content data.

3. A computer system according to claim 1, wherein the server extracts data having the oldest last access data of the data as the second data.

4. A computer system according to claim 1, wherein the server extracts data having the oldest data of the data stored in the first storage area as the third data.

5. A computer system according to claim 1,

wherein the server has a data management table indicating whether the data is stored in the first storage area and whether the data is stored in the second storage area, and

wherein the server determines whether the data is stored in both the first storage area in the server and the second storage area in the storage center by referring the data management table.

8. A data management method according to claim 1, further comprising:

extracting, by the server, data having the oldest last access data of the data as the second data.

6. A data management method in a computer system, the computer system comprising a server having a first storage area, and a storage center coupled to the server, and having a second storage area, the data management method comprising:

when the server stores first data in the first storage area, the first storage area having a remaining capacity that is not sufficient to store the first data, if there is any data stored in both the first storage area in the server and the second storage area in the storage center, deleting, by the server, second data stored in the first storage area to secure a storage area for storing the first data in the first storage area, the first data being included in the data stored in both the first storage area in the server and the second storage area; and

when the server stores first data in the first storage area, the first storage area having a remaining capacity that is not sufficient to store the first data, if there is no data stored in both the first storage area in the server and the second storage area in the storage center, transferring, by the server, third data to the storage center and deletes the second data stored in the first storage area to secure the storage area for storing the first data in the first storage area.

7. A data management method according to claim 6, wherein the first data, the second data, and the third data are content data.

9. A data management method according to claim 6, further comprising:

extracting, by the server, data having the oldest data of the data stored in the first storage area as the third data.

10. A data management method according to claim 6,

wherein the server has a data management table indicating whether the data is stored in the first storage area and whether the data is stored in the second storage area, and

wherein the server determines whether the data is stored in both the first storage area in the server and the second storage area in the storage center by referring the data management table.