Fan Out - HP StoreOnce B6000 Series Manual

Figure 5 Replication elements, using libraries
1. Host backing up
2. Source Appliance
4. Non-Replicating Device (Share or Library)
5. Replication Source Device (Share or Library)
When configuring replication on complex sites, for example many Remote Sites into a Data Center,
care must be taken when planning how appliances, shares and libraries will be replicated. The
key concepts to understand are FAN OUT, FAN IN and Concurrency.

Fan OUT

When we talk about FAN OUT, we are considering the number of replication Target Appliances
that are supported from that Source Appliance (the HP StoreOnce Backup System that contains
the shares and libraries that you wish to replicate).
Each share on the Source Appliance may be mapped to only one share on the Target Appliance.
You cannot split files from one Source Share across several Target Shares.
Each library on the Source Appliance may be mapped to only one library on the Target Appliance.
You cannot split slot mappings from one Source Library across several Target Libraries.
NOTE: Any number of slots within a Replication-Source library may be selected for replication
to a Replication-Target library. This selection is called a slot mapping collection and may be edited
after initial mapping creation.
The number of Target Appliances to which a Source Appliance can replicate varies according to
HP StoreOnce Backup System, see the tables in the Job Concurrency section below.
For example: If you have backed up data on the source HP StoreOnce Backup System that relates
to specific regions, you may want to replicate that data to regional data centers.
The following examples are for illustration only. If your Company policy does not dictate
geographically unique data centers, there is no reason why you could not support all four libraries
or shares on a single Target Appliance, as described in the FAN IN section.
HP B6000 Series
Each HP B6000 Source Appliance can replicate to up to eight Target Appliances per node.
This equates to 16 Target Appliances per couplet or 64 Target Appliances with the maximum
four–couplet configuration.
HP D2D4xxx Series
3. Target Appliance
6. Replication Target Device (Share or Library)
Replication concepts and terminology 25