Patent ID: 9110839
Filing Date: 2015-08-18
Classification: G06F

Abstract:
1. A storage system, comprising: a CPU; a data storage controlling unit, implemented by the CPU, that stores storage target data and address data in a storage device, the address data being data based on a data content stored in a pointed object and a storage location and pointing to the storage target data or other address data, and when attempting to store, in the storage device, another piece of storage target data having a data content identical to a data content of a piece of the storage target data having been stored in the storage device, stores, in the storage device, the address data pointing to the piece of the storage target data having been stored in the storage device as the another piece of storage target data; and a data release controlling unit, implemented by the CPU, that releases a storage region in the storage device, the storage region storing a piece of data, which is not pointed to by other address data, of the storage target data or the address data stored in the storage device, wherein the data storage controlling unit stores the storage target data or the address data in the storage device with respect to each time zone divided in a time-series manner, and the data release controlling unit releases a storage region in the storage device, the storage region storing a piece of data, which is not pointed to by other address data, of the storage target data or the address data stored in the storage device in a past time zone before a current time zone.