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…

Question

Options

• Adynamic LUN management
• Bcluster swap
• CRemote Copy
• Dvolume migration

• A
  4% (2)
• B
  6% (3)
• C
  16% (8)
• D
  75% (38)

Explanation

Peer Motion on HP StoreVirtual Storage: Volume migration Peer Motion on HP StoreVirtual Storage allows a system administrator to move an HP StoreVirtual volumefrom onecluster to another, online, without having to reconfigure the host or applications. This is done by simply editingtheproperties of a volume, selecting the Advanced tab, and choosing a new cluster from the cluster drop-downbox. Theblocks that make up the volume on the original cluster will begin to migrate to the new cluster, and theLeftHand OSwill automatically redirect and proxy requests for blocks to the proper cluster as the data migration isunderway. Whenthe migration is complete the iSCSI sessions to the new cluster from the host are automatically restored(assumingthe new cluster's virtual IP address has been added to the iSCSI configuration of the host server). A typicaluse case forPeer Motion could be a volume that contains data for an application that has increasing performance needs. If Thevolume started out on an MDL SAS cluster, a storage administrator could use Peer Motion to move the volumeto aSAS-based cluster. If the volume is on a SAS cluster, the storage administrator could choose to add morenodes to thecluster to provide more performance for the volume, or they could choose to move the volume to an evenhigherperforming 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 tophysicalhardware resources no longer applies. This virtualization allows volumes to be moved dynamically betweendifferentphysical hardware clusters, and also allows for a feature called cluster swap--the ability to remove existingstoragenodes from a cluster and replace them with new storage nodes, online, with no loss of data or data availability. In oneoperation, data from the old storage nodes is moved to the new storage nodes, and all IO is properly directedto thecorrect node. Upgrading to newer, faster, or larger storage nodes does not require any downtime, providing aclear,well-defined strategy for future expansion and growth. As an example, a customer might start out with a clusterof8 drive systems. As the customer adds more applications and workload to the cluster, they could reach thePerformanceor capacity limit of the nodes. They could easily migrate to nodes with 12 or more drives to increase capacityandperformance, without having to bring any applications offline.

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