Patent ID: 8775600
Filing Date: 2014-07-08
Classification: G06F

Abstract:
1. A computer system comprising: a server having a first storage area; and 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, the server determines whether there is any data stored in both the first storage area in the server and the second storage area in the storage center, wherein 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 deleted second data being included in the data stored in both the first storage area in the server and the second storage area before deleting the second data stored in the first storage area, wherein if data is not stored in both the first storage area in the server and the second storage area in the storage center, but is stored in the first storage area and is not stored in the second storage area, the server transfers third data, which is the data stored in the first storage area, to the storage center and deletes the third data stored in the first storage area to secure the storage area for storing the first data in the first storage area, wherein the server manages management information for the second data and the third data, and the storage center manages management information for the second data, wherein when the server deletes the second data stored in the first storage area, the server deletes the address of the first storage area for the second data in the management information and updates the management information, wherein after the server transfers the third data to the storage center, the storage center creates the management information for the third data, and wherein when the server deletes the third data, the server deletes the address of the third storage area for the third data in the management information and updates the management information to indicate that the third data is stored in the storage center.