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Chapter 4. The command file UPS.CMD 67

Chapter 4. The command file UPS.CMD

All actions necessary for shutting down a node in the cluster are performed by the

command file UPS.CMD. The command file covers attachment of the cluster to

one or two UPS units. Startup procedures may be implemented as well.

In this chapter, we explain the command file’s structure. Understanding of these

internals is essentially because the administrator has to modify the file before

using it. There are four sections that must be changed.

The command file has been designed and tested with Microsoft Windows NT 4.0

Enterprise Edition, English version only. A version for Windows 2000 is also

available. See Appendix A, “Downloading the additional material” on page 73 for

details on how to get them.

The UPS.CMD file is also listed in full in Appendix B, “UPS.CMD” on page 77.

This chapter discusses the main segments of the command file:

• 4.1, “Global Variables in the Command File UPS.CMD” on page 67

• 4.2, “Parameter UPSOnBattery” on page 68

– Parameter UPSOnBattery — case: MoveClusterGroups

– Parameter UPSOnBattery — case: GroupOffline

• 4.3, “Parameter SingleUPSOnBattery” on page 71

• 4.4, “StartUp Parameter” on page 72

4.1 Global Variables in the Command File UPS.CMD

Like most other programs, some variables defined at the beginning of the

command file are used throughout the code. In lines 43 and 44, the names of the

cluster nodes are defined. In our scenario we have chosen NF8500R and

NF8500L.

043 SET NodeAName=NF8500R

044 SET NodeBName=NF8500L

The node name corresponds to the computer name in Microsoft Windows NT.

The computer name is defined in the system environment variable

COMPUTERNAME. The names have to be defined because the file relies on

variables in order to use the same code on both nodes. This reduces the

administrative efforts necessary to run the script.

See Appendix A, “Downloading the additional material” on page 73 for

insturctions on how to download UPS.CMD.

Downloading UPS.CMD

The node names in lines 43 and 44 must be changed by the administrator.

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APC AP9606 Specifiche Pagina 75