Administrator Guide

backup and deduplication data is replicated in real-time or via a scheduled window in a network environment. In a
replication relationship between two DR Series systems, this means that a relationship exists between a pair of systems.
One system acts as the source and the other as a target in this replication pair (for example, acme-west and acme-east).
When this type of relationship exists between distinct containers on two distinct DR Series systems, it can be
considered bidirectional in the sense that:
• The West1 container on the acme-west source system can replicate data to a separate East1 container on the
acme-east target system.
• The East2 container on the target acme-east system can also replicate data back to the West2 container on the
source acme-west system.
This form of replication involves separate containers on two distinct DR Series systems. Target containers in replication
must always act as read-only, while sources containers can act as read-write. Unlike NFS and CIFS containers, OST and
RDS container replication is handled by the two supported Data Management Applications (DMAs) on media servers.
For more information on OST, see Understanding OST. For more information on RDS, see Configuring and Using Rapid
Data Storage.
NOTA: OST and RDS containers are categorized as Rapid Data Access (RDA) containers in DR Series systems.
The DR Series system supports the 32:1 replication of data, whereby up to 32 source DR Series systems can write data
to different individual containers on a single, target DR Series system. This supports the use case where branch or
regional offices can each write their own data to a separate, distinct container on a main corporate DR Series system.
NOTA: Be aware that the storage capacity of the target DR Series system is directly affected by the number of
source systems writing to its containers, and by the amount being written by each of the source systems.
However, if the source and target systems in a replication pair are in different Active Directory (AD) domains, then the
data that resides on the target system may not be accessible. When AD is used to perform authentication for DR Series
systems, the AD information is saved with the file. This can act to restrict user access to the data based on the type of
AD permissions that are in place.
NOTA: This same authentication information is replicated to the target DR Series system when you have replication
configured. To prevent domain access issues, ensure that both the target and source systems reside in the same
Active Directory domain.
Replicación inversa
Los sistemas DR Series no admiten el concepto de replicación inversa. El motivo es que los contenedores de réplica se
encuentran siempre en un modo R-O (solo lectura) en el sistema DR Series lo que impide realizar operaciones de
escritura.
En casos muy específicos, es posible que los contenedores de réplica admitan un tipo de operación de escritura con la
función exclusiva de restaurar datos desde un destino de archivado. Por ejemplo, es posible replicar datos de nuevo en
el sitio remoto donde esté conectada una aplicación de administración de datos (DMA), conocida también como
software de copia de seguridad, para permitir restaurar estos datos directamente.
Este tipo de caso especifico solo es aplicable para configuraciones en las que las copias de seguridad de los datos se
realizan desde una ubicación remota hasta un contenedor local, y a continuación, se replican sobre una WAN a un
contenedor de réplica con copias de seguridad en cinta. Los datos deben restaurarse de la copia de seguridad en cinta
a la ubicación original; en primer lugar, restaure los datos de nuevo en un contenedor de réplica del sistema DR Series
y, a continuación, restáurelos en la ubicación de la fuente original de los datos en el otro lado del enlace WAN.
NOTA: Si decide utilizar este método alternativo de soluciones temporales, debe configurar una nueva unidad de
almacenamiento de datos en DMA e importar las imágenes antes de que se pueda realizar una restauración a la
ubicación original.
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