A computer storage medium and a data migration method, device and system

Abstract

The invention discloses a data migration method based on a storage virtual machine. Due to the fact that the path between a target roll and a host is a physical backup path under the logic path between an original roll and the host, after historical data of the original roll is synchronized to the target roll, and if an original storage device is disconnected with the host, the host can store datathrough the physical backup path without changing the logic path; meanwhile, due to the fact that an identifier of a storage virtual machine of a target storage device is the same as an identifier ofthe original storage device, and a virtual logic unit number of the target roll is the same as the physical logic unit number of the original roll, the host cannot detect that the adopted storage device is replaced; accordingly, the data migration method inherits the advantages that the data migration application transparency of a storage layer and the migration efficiency are high, and data migration without halt can be achieved. The invention further discloses a computer storage medium and a data migration device and system based on the storage virtual machine, and the computer storage medium and the data migration device and system have the advantages.

Description

technical field [0001] The present invention relates to the computer field, in particular to a computer storage medium and a data migration method, device and system. Background technique [0002] Data migration is a key part of data system integration to ensure smooth system upgrades and updates. In the process of informatization construction, with the development of technology, the original information system is constantly replaced by a new system with more powerful functions, and the original information system often accumulates a large amount of precious historical data during its use, many of which Historical data are all necessary for the smooth launch of the new system. In addition, these historical data are also an important basis for decision-making analysis. [0003] At present, there are many methods for data migration, such as data migration based on host logical volume mirroring technology, data migration based on database backup and recovery technology, data ...

AI Technical Summary

Problems solved by technology

The data migration of storage virtualization technology is mainly used to solve the problem of massive data migration between heterogeneous storages. Although it inherits the advantages of transparent application and high migration efficiency for data migration at the storage layer, this method needs to be implemented on the original storage device. To virtualize and change the logical path of stored data, the host needs to re-identify the storage device and logical unit number (LUN). Therefore, when this method is applied, there is a business downtime window, and data migration without downtime cannot be realized.

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