Abstract: A data deduplication method includes: receiving a write request with first data block; writing the first data block into a storage device; writing metadata of the first data block into a first partition that is in a plurality of partitions of a metadata management structure and that is determined based on a feature of the first data block; and deleting the metadata of the first data block in the first partition and deleting the first data block from the storage device based on address information of the first data block when a fingerprint that is the same as the fingerprint of the first data block exists in the first partition. The method can prevent infrequently updated data from being evicted because resources are occupied by frequently updated data, thereby improving a deduplication ratio.

Abstract: In a data compression method, a computing device determines a compression feature value of to-be-compressed data based on a first parameter that affects a compression result of the to-be-compressed data. The computing device determines, based on the compression feature value, a compression policy for compressing the to-be-compressed data. The computing device then compresses the to-be-compressed data according to the compression policy to obtain compressed data, and stores the compressed data.

Abstract: In a data compression method, a computing device determines a compression feature value of to-be-compressed data based on a first parameter that affects a compression result of the to-be-compressed data. The computing device determines, based on the compression feature value, a compression policy for compressing the to-be-compressed data. The computing device then compresses the to-be-compressed data according to the compression policy to obtain compressed data, and stores the compressed data.