Prerequisites for creating a Primary RVG of an RDS


Prerequisites for creating a Primary RVG of an RDS
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Before creating a Primary RVG of an RDS, the following prerequisites must be met:

The data volumes and SRL must exist on the Primary. If the data volumes and SRL do not exist on the Primary, create them. To associate a volume set to the RVG, the volume set must exist on the Primary.
The SRL cannot be a volume set or a component volume of a volume set.
The data volumes and SRL must be started. If the data volumes and SRL are not started, start them. When a data volume is started, its state is active.
The data volumes used by the application must exist in the same RVG. Include the data volumes used by the application in the same RVG.
Make sure you include the appropriate loopback address(es) in the /etc/hosts file.
- If your environment only uses IPv4, you must include an IPv4 loopback address in the /etc/hosts file. The following is a sample entry:
```
127.0.0.1      localhost       loopback
```
- If your environment only uses IPv6, you must include an IPv6 loopback address in the /etc/hosts file.
```
::1            localhost       loopback
```
- If your environment uses both IPv4 and IPv6, the /etc/hosts file must include both loopback addresses.
```
127.0.0.1      localhost       loopback
::1            localhost       loopback
```
On Solaris 11, you must manually edit the /etc/hosts file to remove the hostname from the lines for loopback addresses.

For example:
```
::1 seattle localhost
```
```
127.0.0.1 seattle loghost localhost
```
needs to be changed to:
```
::1 localhost
```
```
127.0.0.1 loghost localhost
```
```
129.148.174.232 seattle
```

To create a Primary RVG of an RDS

Issue the following command on the host on which you want to create the Primary RVG:

# vradmin -g diskgroup createpri rvgname \
      dv01_name,dv02_name... srl_name

The argument rvgname is the name of the RVG to be created.

The argument dv01_name,dv02_name,... is a comma-separated list of the names of the data volumes to be associated to the RVG. Each item can be an independent data volume name, or the name of a volume set. To associate a volume set to the RVG, specify the name of the volume set, not the names of the individual component volumes.

Note:

In previous releases, component volumes could be associated directly to an RVG. Beginning in Release 5.0, the volume set itself is associated to the RVG, enabling VVR to verify consistency between the volume sets on the Primary and the Secondary RVGs. The vradmin createpri command fails if a component volume of the volume set and the volume set itself are each specified for an RVG.

The argument srl_name is the name of the SRL to be associated to the RVG.

Use -nodcm option if you do not want DCMs to be added to the data volumes. By default, DCMs are added automatically.