| 摘要 |
PROBLEM TO BE SOLVED: To provide flexible capacity management and efficient power management function in a mass storage system. SOLUTION: A data set is allocated into a plurality of data chunks, wherein the plurality of data chunks is thinly provisioned and erasure coded. A storage device is divided into first and second storage device sets, wherein the first storage device set is powered up and the second storage device set is powered down. The data chunks are distributed on the first storage device set to equally load each of the first storage device set. When a storage device from the second storage device set is powered up to reassign the storage device to the first storage device set, data chunks are migrated to a reassigned storage device until a plurality of data chunks is evenly distributed on the first storage device set and the reassigned storage device. COPYRIGHT: (C)2011,JPO&INPIT |
