36.2 Installing the DVA

The DVA can be installed and configured along with the POA when you create a new post office. For background information, see Adding a Post Office in the GroupWise 18 Installation Guide. You can also add the DVA to an existing post office.

The DVA software is installed along with the GroupWise Server component. Then you use the GroupWise Administration Utility (GWAdminUtil) to configure the DVA as an agent service.

IMPORTANT:You can run only one DVA per server.

36.2.1 Linux: Installing and Starting the DVA

Ensure that the server where you install the DVA meets the system requirements listed in Hardware and Operating System Requirements in the GroupWise 18 Installation Guide.
(Conditional) If you are setting up the DVA on a server where there is not a post office:
1. Install the GroupWise Server component.
  
  Follow the instructions in Step 1 through Step 9 in Linux: Installing the GroupWise Server Software in the GroupWise 18 Installation Guide to install and start the GroupWise Admin Service, but do not start the Installation console. You do not need to create a post office in order to set up the DVA on the server.
2. Close GroupWise Installation Wizard.
3. Enter the following command to verify that the GroupWise Admin Service is running:
```
rcgrpwise status
```
4. Skip to Step 4.
(Conditional) If you are setting up the DVA on a server with a domain or post office, enter the following command to view the GroupWise agent services that are already set up on the server:
```
gwadminutil services --list
```
This list shows what is currently configured in the gwha.conf file. For background information about the gwha.conf file, see Automatically Restarting the Linux GroupWise Agents with the GroupWise High Availability Service in the GroupWise 18 Installation Guide.
Enter the following command to install the DVA as a service that can be managed by the GroupWise High Availability Service.
```
gwadminutil services -i -dva
```
Use the list command provided in Step 3 to see that the DVA is now configured as an agent service.
Enter the following command to check the statuses of all the GroupWise services on the server:
```
rcgrpwise status
```
Notice that the new DVA is not yet running.
Enter the following command to start the new DVA:
```
rcgrpwise start gwdva
```
Repeat the status command in Step 6 to verify that the new DVA is running.

You cannot start and stop the DVA in the GroupWise Administration Console as you can the other GroupWise agents. You must mange the DVA on the command line.
Skip to Setting Up the DVA.

36.2.2 Windows: Installing and Starting a New DVA

Ensure that the server where you install the DVA meets the system requirements listed in Hardware and Operating System Requirements in the GroupWise 18 Installation Guide.
(Conditional) If you want to set up a DVA on a server where there is not a post office:
1. Install the GroupWise Server component.
  
  Follow the instructions in Step 1 through Step 9 in Windows: Installing the GroupWise Server Software in the GroupWise 18 Installation Guide to install, configure and start the GroupWise Admin Service, but do not start the Installation console. You do not need to create a post office in order to set up the DVA on the server.
2. Close GroupWise Installation Wizard.
3. Click Control Panel > Administrative Tools > Services to verify that the GroupWise Admin Service is running.
4. Skip to Step 4.
(Conditional) If you are setting up the DVA on a server with a domain or post office, click Control Panel > Administrative Tools > Services to view the GroupWise services that are already set up on the server.
At the Windows command prompt, enter the following command to set up the DVA as a Windows service.
```
gwsc -i -dva
```
Enter the following command to see that the DVA is now configured as an agent service.
```
gwsc --list
```
Refresh the list of Windows services to check the statuses of all the GroupWise services on the server.

Notice that the new DVA is not yet running.
Start the new DVA as you would start any other Window service.

You cannot start and stop the DVA in the GroupWise Administration Console as you can the other GroupWise agents. You must mange the DVA as a Windows service.
Continue with Setting Up the DVA.