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Synchronization and Replication
To replicate, you volume data on both hosts must first match the data on both volumes. To achieve this, the process of copying data in disk blocks block units from the source to the target via the network is called synchronization. On the other hand, replication Only when synchronization is complete does it move to the replication state.
Replication is an operation that reflects the change in real time to the target side when data on the source side is changed by write I/O. Synchronization works operates slowly in the background, but while replication happens quickly and without any delaysoccurs quickly in the context of local I/O.
Although synchronization and replication operate separately, they can occur simultaneously at one point. In other words, since replication can be processed simultaneously while synchronization is being performed (if the actual operating node is synchronizing, you should think that these two operations are always processed simultaneously by write I/O during operation), the processing bandwidth between them is reduced. It is important to properly adjust within the range of maximum network processing bandwidth. For information on setting the sync band, see Adjust sync speed.
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