Designing Disaster Recovery Clusters using Metroclusters and Continentalclusters, Reprinted October 2011 (5900-1881)

where:
◦ -usr_aw <percent> is the allocation warning alert limit for the user space specified
in percentage. This generates an alert when the user space of the volume exceeds
a specified percentage of the volume’s size.
◦ -usr_al <percent> is the allocation limit of the user space specified in percentage.
This prevents the user space from exceeding a specified percentage of the volume’s
size.
4. Export the created volume to all the nodes in the primary site of the Metrocluster.
cli% createvlun <volume_name> <LUN> <host name>
NOTE: The volumes on the recovery storage system must be exported to the nodes in the
recovery site after the the Remote Copy volume group is created. Secondary volumes cannot
be exported when they are being added to the Remote Copy volume group.
After the 3PAR virtual volume is exported to the hosts, the mapping between the 3PAR virtual
volume and HP-UX disk name is done using WWN. To find the WWN of the virtual volume,
login to the 3PAR array which has the virtual volume, and run the following command:
cli% showvv -d <virtual_volume_name>
Once the WWN of the 3PAR virtual volume is obtained, find the WWN of the disk using
ioscan or scsimgr commands.
For example:
scsimgr -p get_attr all_lun -a device_file -a wwid
5. Create a synchronous Remote Copy volume group on the primary system and assign the
created volume to that group.
On primary storage system:
cli% creatercopygroup –domain <domain_name> <group_name>
<target_name>:sync
cli% admitrcopyvv <volume_name> <group_name>
<target_name>:<volume_name>
NOTE: The creatercopygroup command creates a volume group on the primary storage
system. It also creates a corresponding Remote Copy volume group on the recovery storage
system. The corresponding Remote Copy volume group on the recovery storage system uses
the <primary_group_name>.r<system_ID> naming convention. To view the Remote Copy
volume group name on the recovery storage system, issue showrcopy command.
where:
• <group_name> is the name of the Remote Copy volume group to be created.
• <target_name> is the recovery storage system.
• <volume_name> is the name of the virtual volume created in step 3.
It is also recommended to set the auto_recover policy for the Remote Copy volume group as
shown below:
cli% setrcopygroup pol auto_recover <group_name>
• When the link goes down, and the remote copy volume group is in a stopped state ( that
is, replication is not happening ), setting auto_recover option restarts the group
automatically when the link is restored.
6. Export the created volume to all the nodes in the recovery site of the Metrocluster.
cli% createvlun <volume_name> <LUN> <host name>
Configuring an application in a Metrocluster with 3PAR Remote Copy environment 317