Users can perform synchronization, splitting, and primary/secondary switchovers for a single
remote replication session or perform these operations for multiple remote replication sessions
using a consistency group. Note the following when creating a consistency group:
l Remote replication sessions can be added to a consistency group only on the primary
storage system. In addition, secondary LUNs of all member remote replication sessions
must be in the same remote storage system.
l LUNs of different member remote replication sessions in a consistency group can belong
to different working controllers.
l Remote replication sessions in the same consistency group must use the same remote
replication mode.
Remote Replication Without Using a Consistency Group
Data on LUNs not added to a consistency group is at risk for becoming unavailable, as shown
in Figure 1-6.
OceanStor V3 Series
Remote Replication Feature Guide for Block
1 Feature Description
Issue 06 (2018-01-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
17
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