Multi-Node Replication Scaling; Vls Replication Implementation; Licensing; Replication Scaling - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

Multi-node Replication Scaling

The HP VLS9000 and VLS12000 architectures allow formidable scaling in terms of capacity and
performance. Supporting multiple nodes, the backup throughput, deduplication comparison, and the
replication process can be load balanced across all the available nodes to ensure no bottlenecks to
performance. Because the VLS hardware should never be the bottleneck for replication, the LAN/WAN
link will be the bottleneck. For example, a 4-node configuration backing up 60 TB per day could
require a 1000 Mbit link for the daily replication traffic; this bandwidth is easily achieved by balancing
the replication workload across the four nodes.
Figure 72 Replication Scaling
.
The main reason to have replication LAN links on each node is to distribute the replication processing
evenly across the nodes (not to increase the bandwidth). Always use all of the nodes for replication
or you risk overloading the master node.

VLS Replication Implementation

You must perform the following to implement replication on VLS systems.

Licensing

On HP VLS devices, the replication is licensed as follows:
• Requires Accelerated deduplication to be fully licensed and enabled on both the source and target
devices.
• Requires VLS replication licenses on the replication target device, with one license for each node
configured in the target device. In active-passive deployment, you would install one license per
node in the passive target device. In many-to-one deployment, you would install one license per
node on the one target device (this then supports up to ten source devices, and additional licenses
164 Virtual Library Systems