Data migration method and device based on hierarchical storage

Abstract

The invention provides a data migration method and device based on hierarchical storage. The data migration method based on hierarchical storage comprises the steps that when a storage system is busy, the proportion of the used storage dimension of a high-speed storage pool to the total storage dimension of the high-speed storage pool is obtained; when the proportion of the used storage dimension of the high-speed storage pool to the total storage dimension of the high-speed storage pool is larger than or equal to a preset first threshold and smaller than a preset third threshold, the dimension of each cold datum in the high-speed storage pool is obtained; the dimension of each cold datum in the high-speed storage pool and the dimension of a preset second threshold are compared, and the cold data larger than or equal to the preset second threshold in the high-speed storage pool are migrated to a common storage pool. According to the technical scheme, influences on data processing from differences of transmission speeds of data in deferent dimensions are reduced, and therefore overall use performance of the storage system and use experience of users are improved.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a data migration method and device based on hierarchical storage. Background technique [0002] Hierarchical data storage refers to storing data in storage devices with different performance levels based on information lifecycle management, according to the characteristics of data such as importance, availability, access frequency, and storage cost, and realizing data storage through hierarchical storage management. Migration between devices. [0003] At present, data migration methods based on tiered storage in the industry are mainly based on data access popularity. The tiered storage method is used to move infrequently accessed data to a lower level in the storage hierarchy, thereby releasing higher-cost resources. The storage space is reserved for more frequently accessed data, which can greatly reduce the space occupied by non-hot data in high-speed storage devices, sp...

AI Technical Summary

Problems solved by technology

[0004] However, data migration or write-back will increase the overhead of system storage and affect performance

Data of different sizes have different transmission rates. If no judgment is made during the data migration process, then when the system is under high pressure, the data migration of a large number of small objects will seriously affect the efficiency of the storage system and the customer's perception of usage.

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