Configuring And Using Replication; Replication Overview; How Is Replication Initiated - HP StorageWorks D2D - Backup Systems User Manual

7 Configuring and using replication

NOTE:
When considering replication you are likely to be synchronizing data between different models of
HP D2D Backup Systems. Unlike the rest of this user guide, the examples in this chapter are not specific
to a particular model of HP D2D.
In this chapter:
• "Replication
• "Preparing for
• "Replication
• "Backup applications and target
• "Replication deployment
• "Seeding the Replication Target
• "Replication
• "The Replication
• "Recovering a source

Replication overview

Replication is a standard term used to describe a way of synchronizing data between hardware in
two physical locations. HP D2D Replication allows cartridges in slots on a library device that has
been configured on one HP D2D Backup System (the Source Appliance) to be replicated to
corresponding mapped slots on a library device on another HP D2D Backup System (the Target
Appliance) at another location.
Replication is the process of creating an exact match on the target appliance of the specified data
from the source appliance. Data is always mapped at slot level. It is important to understand that no
history is held; the target appliance always mirrors as soon as possible the current state of the data
on the source appliance, which means that it is ready for use if the source library or appliance is
unavailable. But it does not hold archive versions and is not an alternative to conventional backup
with multiple restore points.

How is replication initiated?

Once you have set up a replication configuration between Source and Target HP D2D Backup Systems,
it is initiated automatically whenever a cartridge is returned from a drive to a slot that has been
configured for replication. A Configuration Wizard is provided to take you through replication
configuration steps.
overview" on page 75
replication" on page 76
terminology" on page 76
libraries" on page 82
strategies" on page 84
Appliance" on page 88
licensing" on page 86
process" on page 88
appliance" on page 94
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