Alibaba Group Holding Limited
Method and system for mitigating read disturb impact on persistent memory

Abstract:

One embodiment facilitates data placement in a storage device. During operation, the system receives chunks of data to be written to a non-volatile memory. The system encodes a first chunk based on a first error-correcting code (ECC) to obtain a first ECC-encoded codeword. The system encodes a first group of ECC-encoded codewords which include the first ECC-encoded codeword, based on an erasure code (EC) to obtain a first EC-encoded group, wherein a respective EC-encoded group includes EC parity bits. The system encodes the EC parity bits of the obtained first EC-encoded group based on a second error-correcting code (ECC) to obtain ECC-encoded EC parity bits. The system writes the first EC-encoded group and the ECC-encoded EC parity bits to the non-volatile memory.