HP StoreOnce Backup System Concepts and Configuration Guidelines (BB877-90913, November 2013)

• HP StoreOnce Catalyst is an additional licensable feature both on the StoreOnce appliance
and within the backup software because of the advanced functionality it delivers.
• HP StoreOnce is only supported on HP Data Protector 7.01, Symantec NetBackup 7.x and
Symantec Backup Exec 2012.
StoreOnce interfaces with StoreOnce Catalyst
The following diagram shows the basic concept of a StoreOnce Catalyst store; it is a network
based (not FC based) type of backup target, that exists alongside VTL and NAS targets. The main
difference between a Catalyst store and VTL or NAS devices is that the processor-intensive part of
deduplication (hashing/chunking and compressing) can be configured to occur on either the media
server or the StoreOnce appliance.
• If deduplication is configured to occur on the media server supplying data to the Catalyst
store, this is known as low bandwidth backup or source deduplication.
• If deduplication is configured to occur on the StoreOnce appliance where the Catalyst store
is located, this is known as target-side deduplication or high-bandwidth backup. ALL the
deduplication takes place on the StoreOnce appliance.
The low bandwidth mode is expected to account for the majority of Catalyst implementations since
it has the net effect of improving the overall throughput of the StoreOnce appliance whilst reducing
backup bandwidth consumed. It can also be used to allow remote offices to back up directly to a
central StoreOnce Appliance over a WAN link for the first time. Catalyst stores are tolerant of high
latency links – this has been tested by HP. The net effect is the same in both cases – a significant
reduction in bandwidth consumed by the data path to the backup storage target.
Figure 32 StoreOnce interfaces with StoreOnce Catalyst
StoreOnce interfaces with StoreOnce Catalyst 59