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To replicate, volume data on both hosts must first match. Data At this time, data is copied from the source to the target in disk block units over the network. This using disk blocks as a unit, and this process is called synchronization. Only when
Once synchronization is complete does it move to the replication state.Replication is an operation that reflects , both volumes will be in a completely identical state, and if data changes occur on the source side, only the changes will be reflected to the target side to maintain the consistency of both volumes.
Here, when data on the source side changes, the operation of reflecting the change in real time to the target side when data on the source side is changed by write I/Ocalled replication. Synchronization operates slowly in the background, while replication occurs quickly in the context of local I/O.
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