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Multivolume

In many cases, storage for a single service job task is composed of organized into 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 these volumes need to be treated as a single resource. Operating multiple volumes together on a single resource is called a multivolume configuration. When operating a single resource as a multivolumewith multivolumes, the buffer queue for replication replicated data is operated as a single queue , ensuring that the service side of the to ensure service-side consistency by serializing the order of read/write requests for service I/O is consistent with the order of occurrenceto disk volumes.

The number of multivolumes is theoretically unlimited, but in practice, you should operate no more than three. If if the number of volumes becomes too large, the delay in the buffer queue can become severe and difficult to control. On a 1 Gbps network, a configuration of three volumes or less is appropriate.