Users Guide

Figure 56. Asynchronous Remote Replication
Asynchronous remote replication (legacy) details
The aRR feature is similar to Remote Replication (RR) by allowing source virtual disks from a primary
storage array to be replicated to a target virtual disk on a remote storage array. However, aRR supports
both iSCSI and fibre channel connections between the storage arrays and uses point-in-time replication
strategy. aRR enables you to manage the synchronization process of creating a consistent data set on a
remote storage array.
A remote replication group may contain several replicated pairs that you can manage as one entity. A
replicated pair consists of a primary virtual disk and a secondary virtual disk. Both virtual disks contain
identical copies of the same data. Write operations are performed to the primary virtual disk and then
replicated to the secondary virtual disk based on the RRG synchronization settings.
An RRG defines the synchronization settings for all replicated pairs in the group. Each replicated pair in an
RRG shares the same synchronization settings, primary and secondary role, and write mode. You can
synchronize all replicated pairs in the RRG at the same time.
A remote replication group is associated with the local storage array and remote storage array in the
replicated pair.
• The local storage array performs the primary role in the remote replication group. All virtual disks
added to the remote replication group on the local storage array perform the primary role in the
replication relationship.
• The remote storage array performs the secondary role in the remote replication group. All virtual disks
added to the remote replication group on the remote storage array perform the secondary role in the
replication relationship.
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