Your customer has an existing HP StoreVirtual P4500 G2 multi-site SAN, which has become I/O

constrained. They want to implement a new higher performance tier into the existing management
group. Which Peer Motion method provides the ability to dynamically rebalance data volumes to
the higher performance tier?

A.
Dynamic LUN management

B.
Cluster swap

C.
Remote Copy

D.
Volume migration

Explanation:
http://h20195.www2.hp.com/V2/GetPDF.aspx%2F4AA4-2922ENW.pdf
Peer Motion on HP StoreVirtual Storage: Volume migration
Peer Motion on HP StoreVirtual Storage allows a system administrator to move an HP StoreVirtual
volume from one cluster to another, online, without having to reconfigure the host or applications.
This is done by simply editing the properties of a volume, selecting the Advanced tab, and
choosing a new cluster from the cluster drop-down box. The blocks that make up the volume on
the original cluster will begin to migrate to the new cluster, and the LeftHand OS will automatically
redirect and proxy requests for blocks to the proper cluster as the data migration is underway.
When the migration is complete the iSCSI sessions to the new cluster from the host are
automatically restored (assuming the new cluster’s virtual IP address has been added to the iSCSI
configuration of the host server). A typical use case for Peer Motion could be a volume that
contains data for an application that has increasing performance needs. If
The volume started out on an MDL SAS cluster, a storage administrator could use Peer Motion to
move the volume to a SAS-based cluster. If the volume is on a SAS cluster, the storage
administrator could choose to add more nodes to the cluster to provide more performance for the
volume, or they could choose to move the volume to an even higher performing tier, such as an
SSD-based cluster.
Peer Motion on HP StoreVirtual Storage: Cluster swap
The virtualization of storage within an HP StoreVirtual cluster means that the rules about data
being tied to physical hardware resources no longer applies. This virtualization allows volumes to
be moved dynamically between different physical hardware clusters, and also allows for a feature
called cluster swap—the ability to remove existing storage nodes from a cluster and replace them
with new storage nodes, online, with no loss of data or data availability.
In one operation, data from the old storage nodes is moved to the new storage nodes, and all IO is
properly directed to the correct node. Upgrading to newer, faster, or larger storage nodes does not
require any downtime, providing a clear, well-defined strategy for future expansion and growth. As
an example, a customer might start out with a cluster of 8 drive systems. As the customer adds
more applications and workload to the cluster, they could reach the Performance or capacity limit

of the nodes. They could easily migrate to nodes with 12 or more drives to increase capacity and
performance, without having to bring any applications offline.