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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
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
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.
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