Fan In, Fan Out And Job Concurrency; Fan Out; Fan In; Replication Elements - HP StorageWorks D2D100 - Backup System User Manual

Remote Site
1. Host backing up
2. Source Appliance
4. Non-Replicating Library
5. Replication Source Library
Figure 35 Replication elements

Fan In, Fan Out and job concurrency

When configuring replication on complex sites, for example many Remote Sites into a Data Center, care
must be taken when planning how appliances 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 D2D Backup System that contains the libraries that
you wish to replicate).
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.
For example: If you have backed up data on the source HP D2D that relates to specific regions, you may
want to replicate that data to regional data centers.
HP D2D400x and HP D2D41xx Series
Each HP D2D 400x or 41xx Series Source Appliance can replicate to up to four Target Appliances.
Data Center
3. Target Appliance
6. Replication Target Library
D2D Backup System HP D2D2503
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