Hardware manual

Group Administration Volume replication
12–28
Creating a replica
The first time you replicate a volume to a partner, the primary group copies the entire volume contents to replica
reserve on the secondary group. Subsequent replication operations transfer only the volume data that changed since
the previous complete replication.
Note: Very large data transfers might exceed the capacity of
the network link between the primary group and the
secondary group. For replication operations that require transferring large amounts of data, consider using
manual transfer replication. See About manual transfer replication on page 1
2-3.
Prerequisite: Set up the replication partners and co
nfigure the volume or volume collection for replication.
Prerequisite: Yo
u must replicate a template volume before replicating any of its thin clones.
Restriction: Yo
u can replicate a template volume only one time.
See Configuring replication partners on page 1
2-17, Configuring a volume for replication on page 12-25.
1. Click
Volumes, then expand Volumes, then select the volume name, and then click Create replica now.
2. In the Create Replica dialog box:
• If you want to use manual transfer replication to perform the replication, select
Perform manual
replication
.
• Click
Yes to start the replication.
3. Monitor replication to make sure replicas complete in
a timely manner. See Displaying replication activity and
replicas for a volume on pa
ge 12-28.
If replication operations take long
er than expected, make sure you have adequate network bandwidth between the
groups, in addition to full IP routing. A slow network link can cause long replication times.
Displaying replication activity and replicas for a volume
1. Click Volumes in the lower-left panel, then expand Volumes, then select the volume name, and then click the
Replication tab. In the Volume Replication window, the Replication Summary panel shows:
• Current size of the replica reserve.
• Local replication reserve.
• Whether you are keeping the failback snapshot and, if so, the failback baseline timestamp.
•
The amount of data that must be transferred for the next or
current replication.
• Any replication schedules and the next sched
uled replication.
The Remote Replicas panel shows:
• Replica set and individual replicas for the volume. Each replic
a is identified by the date and time the
replication operation started.
• Number of complete replicas and the current size of the replica reserve.