Office A
Host A1
Backup/
Backup
SW
Restore
Figure 40 Active to Passive replication example
Active to Active example
In the following example there are again two offices, each with an HP D2D Backup System. The HP
D2D Backup System in Office A is being used by the host server for backup and restore and all of the
cartridges on the Replication-Source library are being replicated to matching slots on a Replication-Target
library on the HP D2D Backup System in Office B. However, there is also a single host backing up to
six cartridges on another library on the HP D2D Backup System in Office B. Two of those cartridges
are configured to replicate to a Replication-Target library on the HP D2D Backup System in Office A.
A replication license is required for both HP D2D Backup Systems.
Office A
Host A1
Backup/
Backup
SW
Restore
Figure 41 Active to active replication example
Many to One example
In the following example a company has two remote offices and a central data center. There are small
HP D2D Backup Systems in each remote office which host Replication-Source Libraries for backup from
local host machines. In the data center there is a larger D2D Backup System that is used solely to host
Replication-Target Libraries for the remote offices. A replication license is required only for the HP D2D
Backup System in the Data Center. That license covers all Replication-Target libraries.
This is also a good example of slot mapping. Library 2 on the Target Appliance is being used as a
Replication-Target Library by Replication-Source libraries in Office A and Office B. The Replication-Source
library in Office A is replicating two slots (colored red), while the Replication-Source library in Office B
is replicating five slots (colored red).
66
Configuring and using replication
D2D Appliance A
Library A1
Replicate
Library A2
Replicate
D2D Appliance A
Library A1
Replicate
Library A2
Replicate
Office B
D2D Appliance B
Library B1
Library B2
Office B
D2D Appliance B
Library B1
Library B2
Backup/
Restore
Host B1
Backup
SW