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It requires about 200MB to install all the binary execution modules of bsr, and 1GB is required to store the log of bsr, which requires about 2GB of disk installation space.
Mirror
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disks
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 of bsr is unlimited, but the size of the mirror volume we verified is 40TB. Limit the size of the maximum mirror volume to 40 TBcapacity 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, a single service job is composed of multiple volumes, and in this case, it is necessary to respect the order of I/O stored on the volumes and write them to disk volumes and treat multiple volumes as a single resource. Operating multiple volumes together on a single resource is called a multivolume configuration. When operating a single resource as a multivolume, the buffer queue for replication data is operated as a single queue, ensuring that the service side of the service I/O is consistent with the order of occurrence. The number of multivolumes is theoretically unlimited, but in practice, you should operate no more than three. If the number of volumes becomes too large, the delay in the buffer queue can become severe and difficult to control. |
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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