Quantum DXi4500, Руководство пользователя

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Chapter 8: DXi4500 Data Services
Data Replication
Quantum DXi4500 User’s Guide 137
Data Replication
Note: The information in this section applies to native DXi4500
replication. OST optimized duplication using NetBackup is
described separately (see OST Optimized Replication on
page 70).
The DXi4500 can be configured to automatically replicate data on
another DXi-Series system as part of a disaster recovery plan. Replication
is the process of sending replicated data from a source NAS share to a
target NAS share. This process is configurable on a per NAS share basis.
The source system must have replication enabled. The target system can
store replicated NAS share data for one or more source systems. A
system can be both a source (NAS share sending replicated data) and
target (receiving replicated data).
Configuring Replication
for the First Time
For a new DXi4500 installation, or immediately after a new share has
been created, be sure to replicate the namespace (using the on demand
Replicate Now function) for each share as soon as it is created and
before any data is written to it.
This action establishes the namespace structure on the target.
Establishing the namespace structure before any data is written will
expedite the first replication that occurs after the first backup.
Failure to replicate the empty namespace is not fatal, but the speed of
the first replication after the first backup will be up to twice as fast if
you did replicate the empty namespace. This could be especially
important when backing up a significant amount of data.
Replication
Configuration Steps
Configuring Replication consists of the following steps:
1 Before data can be replicated from a source system to a target
system, the target must be authorized to receive data from a
specific source. To authorize a target system to receive data from a
source, you must add the source host name or IP address to the
Source Host List on the target system (see Target Role
Configuration on page 148).