Configuring A Cluster For Disaster Recovery; Best Practice; Configuration Steps - HP StorageWorks P4000 User Manual

Configuring a cluster for disaster recovery

In addition to using a virtual manager, you must configure your cluster and volumes correctly for
disaster recovery. This section describes how to configure your system, including the virtual manager.

Best practice

The following example describes configuring a management group with four storage systems in one
cluster. The cluster spans two geographic sites with two storage systems at each site. The cluster
contains a single volume with Network RAID-10 that spans both sites.

Configuration steps

The following configuration steps ensure that all the data is replicated at each site and the managers
are configured correctly to handle disaster recovery.
1. Name storage systems with site-identifying host names.
To ensure that you can easily identify which storage systems reside at each site, use host names that
identify the storage system location. See
Management Group Name TransactionData
Storage System Names
• Boulder-1
• Golden-1
• Boulder-2
• Golden-2
2. Create management group plan the managers and virtual manager.
When you create the management group in the two-site scenario, plan to start two managers per site
and add a virtual manager to the management group. You now have five managers for fault tolerance.
See "Managers
3. Add storage systems to the cluster in alternating order.
Create the cluster. Add the storage systems to the cluster in alternating order of site, as shown in the
bulleted list. The order in which the storage systems are added to the cluster determines the order in
which copies of data are written to the volume. Alternating the addition of storage systems by site
location ensures that data is written to each site as part of the Network RAID-10 configured when you
create the volume. See
Cluster Name CreditData
Add storage systems to the cluster in the following order
• 1st storage system Boulder-1
• 2nd storage system Golden-1
• 3rd storage system Boulder-2
• 4th storage system Golden-2
172 Using specialized managers
overview" on page 149.
"Creating additional
"Changing the storage system
clusters" on page 177.
hostname" on page 40 .