DSS spreads the data across available storage nodes according to the policy defined for the data set. If a disk on one of the storage nodes in this spread fills up, the DSS will automatically reconfigure itself to spread new data on storage nodes with available disks capacity. This happens fully transparently to the client and does not require operator intervention or reconfiguration.
At any time, storage nodes can be added to increase the overall capacity of the storage system. As soon as a new spread is generated, the capacity on these added nodes will be included to store data. This does not require any reconfiguration of the storage system or the user access interfaces.
The B-Virtual DSS storage system allows provisioning a small number of storage nodes to start with and scaling the storage system modularity by adding storage nodes. No reconfiguration is required as the new storage nodes are automatically added to the available storage pool capacity.