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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.
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