发明名称 |
STORAGE APPARATUS AND DATA MANAGEMENT METHOD |
摘要 |
A control unit of a storage apparatus divides received data into one or more chunks and compresses the divided chunk(s); and regarding the chunk whose compressibility is equal to or lower than a threshold value, the control unit does not store the chunk in the first storage area, but calculates a hash value of the compressed chunk, compares the hash value with a hash value of another data already stored in the second storage area and executes first deduplication processing; and regarding the chunk whose compressibility is higher than the threshold value, the control unit stores the compressed chunk in the first storage area, reads the compressed chunk from the first storage area, calculates a hash value of the compressed chunk, compares the relevant hash value with a hash value of another data already stored in the second storage area, and executes secondary deduplication processing. |
申请公布号 |
US2015142755(A1) |
申请公布日期 |
2015.05.21 |
申请号 |
US201214117736 |
申请日期 |
2012.08.24 |
申请人 |
Kishi Masayuki |
发明人 |
Kishi Masayuki |
分类号 |
G06F17/30 |
主分类号 |
G06F17/30 |
代理机构 |
|
代理人 |
|
主权项 |
1. A storage apparatus comprising:
a storage device providing a first storage area and a second storage area; and a control unit for controlling data input to and output from the storage device; wherein the control unit divides received data into one or more chunks, and compresses the divided chunk or chunks; and regarding the chunk whose compressibility is equal to or lower than a threshold value, the control unit does not store the chunk in the first storage area, but calculates a hash value of the compressed chunk, compares the hash value with a hash value of another data already stored in the second storage area, and executes first deduplication processing; and regarding the chunk whose compressibility is higher than the threshold value, the control unit stores the compressed chunk in the first storage area, then reads the compressed chunk from the first storage area, calculates a hash value of the compressed chunk, compares the relevant hash value with a hash value of another data already stored in the second storage area, and executes secondary deduplication processing. |
地址 |
Nakai JP |