SSD System and method for log-based parity update of SSD array and to defect block and node failures recovery method using the same

摘要

The present invention relates to a system and a method for log-based parity update of SSD array and a method of recovering defects of a block and a node using the same to solve a write amplification problem increased due to a parity update when distributing files in RAID type using parity in an SSD-based massive cluster environment. To this end, according to the present invention, the system for log-based parity update of SSD array includes a RAID controller for controlling an SSD-based massive storage system, and an SSD array for storing files inputted from the RAID controller, wherein the RAID controller includes an address managing unit for distributing data based on a logical address so that the inputted files are stored in the SSD array; a stripe managing unit for generating a stripe by using the logical address transmitted from the address managing unit; a data managing unit for managing insertion/deletion/update of the data transmitted from the stripe managing unit; and a parity managing unit for managing a parity transmitted from the stripe managing unit.