Implementation method and device of distributed consistency group and DRM equipment

Abstract

The invention discloses an implementation method and device of a distributed consistency group. The method comprises the following steps: sending a message for confirming whether a message can be submitted or not to a silence control module of each virtual machine in the distributed consistency group; when messages which can be submitted and are sent by all the silence control modules are receivedwithin set time, directionally sending messages to be submitted to all the silence control modules, and making all the silence control modules to execute silence operation; when a correct response message sent by the silence control module is received, directionally sending a submission message to the corresponding silence control module, so that the corresponding silence control module executesa fence hitting operation; receiving a completion submission message sent by each silence control module after completing the fence hitting operation. According to the method, on the basis of ensuringthe consistency of the distributed consistency group, the blocking time is reduced. The invention further discloses an implementation device of the distributed consistency group, DRM equipment and acomputer readable storage medium, which have the above beneficial effects.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method, device, DRM device and computer-readable storage medium for realizing a distributed consistency group. Background technique [0002] CDP (continuous data protection) continuous data protection technology, which can restore data to any point in time. In a multi-host environment, in order to ensure that associated virtual machines distributed on different hosts can be pulled up at the same time, the CDP disaster recovery system needs to generate the same cross-host consistency fence point. [0003] At present, there are two fence schemes for distributed consistency groups: one is cross-host synchronization clock scheme, the disadvantage is that it is difficult to guarantee millisecond-level clock synchronization; the other is to send silent commands to all hosts, and wait for all hosts to return correct responses (that is, ACK) and then take a consistent snapshot o...

AI Technical Summary

Problems solved by technology

[0003] At present, there are two fence schemes for distributed consistency groups: one is cross-host synchronization clock scheme, the disadvantage is that it is difficult to guarantee millisecond-level clock synchronization; the other is to send silent commands to all hosts, and wait for all hosts to return correct responses (that is, ACK) and then take a consistent snapshot of all disks, and then send the unquiet command. The disadvantage is that it requires multiple network interactions and consumes a lot of performance.

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