METHOD FOR DATA PLACEMENT OF THE DIVIDED BLOCK DISK ARRAY USING DISTRIBUTED PARITY, AND METHOD FOR READ/WRITE CONTROLLING LARGE AND SMALL BLOCK OF THE DIVIDED BLOCK DISTRIBUTED PARITY DISK ARRAY

摘要

Provided are a data placement method using distributed parities in a divided block disk array and a method for controlling large/small block read/write in the disk array. The data placement method can improve large-volume data input/output performance and provide an error tolerance function by using distributed parity in a divided block disk array, while maintaining a small data input/output (write/read) performance, and a method for controlling block/sub-block read/write functions in a divided block distributed parity disk array. The data placement method includes: a) dividing target data into a plurality of large blocks and equally dividing the large blocks into a plurality of sub-blocks, individually; b) generating parity blocks by performing XOR operation on the sub-blocks of each large block; and c) equally distributing the sub- blocks and parity blocks of each large block to all disks of the disk array and placing the parity blocks in a rotational direction.