Method and device for restoring data backup between storages
A data backup and storage technology, applied in the storage field, can solve the problems of automatic data backup, data cannot be backed up, and it is difficult to find the primary mirror and secondary mirror, so as to achieve the effect of unified management and operation
Active Publication Date: 2021-12-03
EMC IP HLDG CO LLC
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Therefore, when the main storage recovers from the interrupted state, the data on the secondary storage cannot be automatically backed up to the main storage through only two local consistency groups, that is, the data backup is interrupted.
[0005] In the case where both consistency groups are local only, although the NAS client can continue to access the data on the secondary storage system, the changed / updated data will not be backed up to the primary storage system
This will result in a loss of data protection
Users can try to rebuild mirror relationship pairs and consistency groups, but it is difficult to find the corresponding primary and secondary mirrors
Method used
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[0030]The principles of the disclosure will be described below with reference to several example embodiments illustrated in the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that these embodiments are only described to enable those skilled in the art to better understand and implement the present disclosure, but not to limit the scope of the present disclosure in any way.
[0031] figure 1 A flowchart 100 showing a method for restoring data backup between storage devices according to an embodiment of the present disclosure. Such as figure 1 As shown, the method 100 includes the following main steps S110-S130:
[0032] In step S110, a mirror relationship pair between the logical unit of the primary storage and the logical unit of the secondary storage is established. In step S120, in response to the main memory returning to the normal state from the interrupted state, the multiple backup...
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Various embodiments of the present disclosure provide a method and apparatus for restoring data backup between memories. The method includes: establishing a mirror relationship pair between a logical unit of the main memory and a logical unit of the secondary memory; One or more backup sessions between the logical units of the secondary storage to rebuild the multiple mirror relationship pairs; and according to the reconstructed multiple mirror relationship pairs, back up data to the main storage.
Description
technical field [0001] Various embodiments of the present disclosure relate generally to the field of storage, and more particularly to methods and apparatus for restoring data backups between storages. Background technique [0002] In a data storage device, for example, a product VNX2 of EMC provides a disaster recovery system of a file layer. If a disaster occurs on the primary storage, the selected Network Attached Storage (NAS) server, together with all its file systems, snapshots and network configurations, can be switched to the secondary storage through continuous data services. [0003] However, there may be situations where the main memory is interrupted, for example due to a power outage. And after the main storage recovers from the interruption state, the data on the secondary storage still cannot be automatically backed up to the main storage. As an example of disaster recovery, VNX2 provides disaster recovery services at the file layer through the MirrorView / S...
Claims
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IPC IPC(8): G06F11/14
CPCG06F11/1402G06F11/1474G06F11/2064G06F11/2071G06F11/2082G06F12/16G06F11/07
Inventor 张明辉熊天放邬源杨陆逸峰许红儒
Owner EMC IP HLDG CO LLC