User guide

Chapter 2 - VMS Installation 2-3
General
Types of Installation
The VMS can be installed in three different configurations:
1. On a single VMS server; Vipersat Operating System (VOS).
2. On two or more (N:1) VMS servers in the optional fault-tolerant, redundant
configuration; Vipersat Operating System (VOS).
3. On a client workstation; Viperview User Interface.
Each of the first two configurations can be made as a:
• Clean Installation - A clean installation is one done on a server that has
not previously operated as a VMS server, or that has had its hard drive re-
formatted. With no existing network database, a full network
configuration (Chapter 3, “VMS Configuration”) must be performed
following installation.
• Upgrade Installation - An installation to be made on a server that has
previously been installed as a VMS server in a Vipersat network,
operating with a previous version of VMS. The existing network database
will be automatically converted during installation, with minimal
configuration changes required.
Upgrading Redundant Server Configuration
Perform the upgrade on the Standby server first. This will allow the installation
of the new software and database conversion to be verified without losing VMS
service. If successful, continue the upgrade by doing the following:
• Deactivate the Active (Primary) server.
• Activate the Standby (Secondary) server.
• Perform upgrade installation on the now deactive server.
This method provides a seamless upgrade with no VMS downtime.
The installation instructions in the following section include special instructions
for each of these various installation types.
Caution: Failure to note and follow the instructions for the intended network
configuration may cause the VMS installation to fail or to operate
erratically.