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Replication concepts and terminology

When configuring appliances for replication, there are some key concepts and terminology that

it is important to understand.

Replication elements

• Source Appliance: This is the StoreOnce Backup System with the NAS share or library device

that is being used for backup by a host server. The NAS share contains data files that need

to be replicated; the library device contains slots that need to be replicated.

• Target Appliance: This is the StoreOnce Backup System with the NAS share or library device

that contains the replicated data; it is an exact match of the NAS share or library on the source

HP StoreOnce Backup System. This appliance needs a replication license.

• Non-Replicating Device: This describes a NAS share or library on a StoreOnce Backup System

that has not been configured as a source or target for replication.

• Replication-Source Device: This describes the NAS share or library on a StoreOnce Backup

System that has been configured for backups from a host server and has also been configured

for replication. Replication-Source shares and libraries are visible to the host.

• Replication-Target Device: This describes the NAS share or library on a StoreOnce Backup

System that has been configured to contain data replicated from a source library. The

Replication-Target share is visible to the host, but Replication-Target libraries are not visible

to the host, unless you configure devices to make it visible. See Backup applications and

Replication Target libraries.

A single HP StoreOnce Backup System may host both Replication-Source and Replication-Target

shares and libraries and can, therefore, act simultaneously in both Source and Target Appliance

roles. However, the host server will only be able to access Replication-Source or Non-Replicating

Libraries. You can configure Replication—Target Libraries to make them visible (read-only). There

is no restriction on the host accessing Replication-Target NAS shares.

Figure 5 Replication elements, using libraries

1. Host backing up

3. Target Appliance2. Source Appliance

4. Non-Replicating Device (Share or Library)

6. Replication Target Device (Share or Library)5. Replication Source Device (Share or Library)

20 Replication

HP D2D User Manual

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