Administrator Guide

Table Of Contents
opens several TCP ports to mirror dierences across the network. Figure 26. Basic NAS Replication shows an example of basic NAS
replication.
When replication nishes, the system creates a replication snapshot and compares the replication snapshot on the destination NAS
cluster to the replication snapshot on the source NAS cluster. Data ows in both directions in NAS replication, meaning that the
same cluster can host both source and destination clusters. The system replicates only incremental changes, which improves
network bandwidth utilization. The data is always consistent on the partner site and available as read-only.
NOTE: You must have group administrator privileges to perform NAS replication operations.
Figure 26. Basic NAS Replication
NAS volume replication consists of the following phases:
Congure NAS volume replication — Create NAS volume replication partnerships, congure NAS volumes for replication, and
delete replication relationships.
Replicate NAS clusters or volumes — Perform manual and scheduled replication operations on NAS volumes, pause and resume
NAS container replication.
Recover NAS volumes — Promote replica volumes to recovery volumes, fail over to recovery volumes, recover data to the
source volume, and fail back to the source volume. Data recovery and failback to a source volume can be performed manually or
automatically.
When you perform replication on your system as part of recovering from a disaster, the type of replication you perform is determined
by the state of your storage resources.
Manual replication — Use this process if you are not able to restore data to the primary volume after failing over to the recovery
volume. For example, if the primary volume must be replaced, you must perform manual replication.
Single-step replication failback — Use this process when the primary volume is available after failing over to the recovery
volume. For example, if the primary volume was taken oine for an update, you can perform a single-step replication failback.
Manually Replicate a NAS Volume
Before you can replicate a volume, the volume must be congured for replication and must have a replication partner congured.
The amount of time that the replication takes to complete depends on the size of the NAS volume and the network connection.
To replicate a NAS volume:
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