APC AP9606 Specifications download pdf (Page 77)

Chapter 4. The command file UPS.CMD 69

094 CLUSTER.EXE %TheOtherNodeName% NODE %TheOtherNodeName% | FIND "Up"

The result of this check is required for the decision whether the Cluster Groups

will be moved to the remote node or brought offline. Note that the code looks for

English output from CLUSTER.EXE. In a non-English version of Microsoft

Windows NT 4.0, this may fail! Thus, if you use another language, you have to

verify the code.

In line 95, the error level of the previous line is analyzed:

095 IF %errorlevel% == 1 GOTO GroupOffline

If the Up string was not found in the output of CLUSTER.EXE, then we make the

assumption that the remote node is either in a status of Node Down or Node

Paused. In every case, the resources must not be moved. The resources have to

be set offline, which is done in line 141 (GroupOffline label).

Otherwise, if the result is that the other node is up, then the node with the name

specified in the variable NodeBName will delay execution for three further

seconds:

097 IF %COMPUTERNAME == %NodeBName% C:\UPS_CMD\DELAY3 3

This is necessary if both nodes reach line 94 at the same time. If both power lines

fail at exactly the same moment, then there is some uncertainty about which node

status is seen. It may be that one node changes to a status of Node Paused some

fractions of seconds later. To avoid a wrong decision by the other node, we

enforce a difference in timing here. There is no command available to do so from

the default Windows NT shell. We developed the small tool DELAY3.EXE, which

can be downloaded as described in Appendix A, “Downloading the additional

material” on page 73. The status of the other node is probed again (lines 100 and

101), and the final decision about moving the resources is made:

100 CLUSTER.EXE %TheOtherNodeName% NODE %TheOtherNodeName% | FIND "Up"

101 IF %errorlevel% == 1 GOTO GroupOffline

If the remote node is detected as Node Up during the second check, the move of

the groups will be initiated (in line 103: jump to line 116). This is described in the

next section. If any other node status was returned, then the resource groups

must be brought offline (4.2.2, “GroupOffline” on page 70).

4.2.1 MoveClusterGroups

126 cluster . GROUP "VFS_a" /MOVETO:%TheOtherNodeName% > NUL

127 cluster . GROUP "VFS_b" /MOVETO:%TheOtherNodeName% > NUL

One line is required for each resource group. The dot after the command cluster

denotes the cluster to which the local node belongs. The name of the group has

to be specified in quotation marks after the parameter GROUP. The parameter

It is mandatory that the administrator enters one line for each resource group

which should be moved to the surviving node when one node shuts down

(below line 125).

Note

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APC AP9606 Specifications Page 77