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Theoretically, the capacity of a BSR's mirror disk is unlimited, but the actual disk capacity is limited to 10 TB. At higher capacity, the meta-area corresponding to the mirror disk capacity grows along with it, and the operation (Attach) that needs to process the entire meta-disk becomes time-consuming and impedes operations.
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Multivolume In many cases, storage for a single Multi-volume Storage corresponding to one service task is organized into often composed of multiple volumes, and . In this case, it is necessary to treat these volumes need to be treated as a single as one resource. Operating In this way, operating multiple volumes on a single by tying them to one resource is called a multivolume multi-volume configuration. When operating with multivolumesresources as multiple volumes, the data processing buffer queue for replicated data is operated as a single queue to ensure service-side consistency by serializing the order of read/write requests for service , thereby serializing the service's write I/O order to the disk volumesvolume to ensure service consistency. The number of multivolumes is theoretically unlimitedThere is no limit to the number of multiple volumes (maximum 65535), but in practicereality, if as the number of volumes becomes too largeincreases, the delay in the buffer queue can queue buffer delay may become severe and difficult to control. On a 1 Gbps network, a configuration of three volumes or less is appropriateIt is realistic to configure no more than 4 to 5 volumes in a 10G network. |
Meta Disk
Depending on the capacity of the replication volume, you need to estimate the capacity of the metadisk. It requires about 33MB of meta disk space per 1TB of the replication volume, and for more accurate size, see Metadata Size Estimation.
Network
throughput
In a recent corporate environment, mirroring on a local network is generally configured with a bandwidth of 1 Gbps to 10 Gbps, and a remote replication environment (Disaster Recovery) for DR (Disaster Recovery) is generally operated with a lower bandwidth. That is, it is applied to a wide range of network environments from very low bandwidth (10 ~ 100Mbps) to high bandwidth. However, because replication in a low-band network environment is bound to affect replication performance due to bandwidth limitations, consider such as linking replication accelerators for performance improvement.
ports
The mirroring ports for replication (specified in the configuration file) must be open. On Windows, additionally TCP loopback ports 5678, 5679 must be open for control.
Storage provisioning
It is only supported for the THICK provisioning method of storage provisioning. Thin provisioning environments with disk space reclamation are not compatible with BSR.
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