Apple Qmaster 2 - Manual (Page 19)

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If you configured this intermediary node as the cluster controller, your work is done
and the extended node cluster is ready to start receiving and processing batches
submitted by Apple Qmaster.
If, instead, you want the extended nodes to be part of a cluster that includes regular
service nodes, use Apple Qadministrator to add this intermediary node to that cluster.
You add an intermediary node in the same way you add other service nodes, as
described in the Distributed Processing Setup guide.
Setting Environment Variables in Apple Qmaster
You may want to set or change an environment variable for submitting certain jobs.
When you set an environment variable within Apple Qmaster, the new setting takes
effect immediately. This gives you an easy way to do things like set common directory
paths or plugin-specific environment variables for Apple Qmaster jobs.
What’s an Environment Variable?
Environment variables are settings within a shell, from which commands are issued
that affect the way a program operates. People who regularly execute commands from
a Terminal shell, or write shell scripts, are usually familiar with environment variables.
For example, the environment variable called PATH tells the shell where to look for
commands that are entered. The PATH that is specified becomes the search path that
is used when locating a program. It is set for you automatically, but you will want to
add to it. For instance, if your username is jane and there is a directory named
groupbin (in your home directory) that contains programs you want to run from a
shell, the environment variable name would be PATH and the value of that name
would be ~jane/groupbin.
What’s a Preflight Script?
A preflight script is a script you can run on each node of a cluster prior to actually
processing the batch. These scripts are sent with every distributed segment of a job.
UP01080.Book Page 19 Wednesday, March 16, 2005 12:54 PM