SLVM Single-Node Online Reconfiguration (SLVM SNOR)

With the SNOR functionality installed, to change the VG configuration, it is required
that:
1. Applications using the VG are scaled down to one node. These applications are
still running on that one node
2. The VG is deactivated on all but one node of the cluster.
3. The activation mode of the VG is changed to exclusive in a single node.
4. Change the configuration on the VG.
5. If required, generate the map file with the changed configuration, copy it over
and re-import it to all the other nodes of the cluster.
6. Activate the VG in shared mode on the single node and then on all the other
cluster nodes.
Application and availability considerations
On the cluster node where the VG stays active, user I/Os will be uninterrupted during
and after the activation mode changes from shared to exclusive and back to shared.
On the other cluster nodes where the VG is deactivated, the application must be scaled
down to the single cluster node, causing a loss of redundancy and possibly performance
degradation for that period.