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bsr synchronizes and replicates the volumes on of hosts in an HA a cluster in real time over the network.
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To replicate, volume data on both hosts must first match. At To achieve this time, data is copied bsr performs a process of copying data from the source to the target using disk blocks as a unit, and this process which is called synchronization.
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A resource is a replication group consisting of one or more volumes that share a common replication stream, which . bsr ensures the consistency of all volumes within the a resource.
A volume is described as a single device and is specified by a drive letter in Windows.
A replica set requires one volume for data replication and a separate volume to store metadata associated with the volume. The meta volume is used to store and manage internal information for replication.
Metadata is divided into external and internal meta types based on where it is stored. For example, if the metadata is located on the disk of the volume being replicated, it is internal meta; if it is located on another device or another disk, it is external meta.
External meta types have an advantage over internal meta in terms of performance because replication I/O and meta data writing can be performed simultaneously during operation, and the I/O performance of the meta disk directly affects replication performance, so it is recommended to configure it with a high-performance disk as much as possible.
The volume for the meta should not be formatted with a filesystem like NTFS and should be configured as RAW.
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