c D SCHEDULE Automated Job Submission System Guide and Reference Manual D SCHEDULE
Automated Job Submission System
Guide and Reference Manual
: 3.1.2 Advanced job examples
E The following examples illustrate some situations where advanced job G interaction can be used. While reading these descriptions, see if they F apply to a job scheduling challenge you may have in your job set. You E can most likely use the advanced job interaction tools to solve this
challenge.
I - Job switching - One advanced job technique is to D switch between jobs by setting a variable that determines "if the I variable is A then run these jobs, if the variable is B then run these I other jobs". This type of job switching is useful for a jobs that need F to be run in certain situations that may be unpredictable. However, F variables can be used for a number of other purposes in addition to these. G
- Reservation system - A reservation system is a H powerful tool that let's you determine whether the job will run based G on the value of an integer. For instance, suppose you have a limited I amount of disk space and your jobs require the use of a certain amount F of disk space. You can assign each job a variable in the form of an E integer and then subtract that integer from a total available disk G space integer. When the maximum disk space available is used up, job 5 will be queues up using a simple IF-THEN construct. F
- Job intersection - The intersection method is G especially useful where you only want a single job to run at a time. G Suppose you have a job set that updates a database using a number of H jobs. However, the database can only be opened and updated by one job J at a time. Using the job intersection method, the jobs can be set up to H run exclusive of each other by setting a variable that prevents other D jobs from running whenever a job executes. This can be done using . variable assignments and IF-THEN constructs. H
- Shut off valve - The shut off valve is a way to F turn off all or some of the jobs in a job run by manually setting a ( variable to off. By inserting the line
" " IF valve == off THEN SUPPRESS_RUN |
J
into each of the jobs in a run, you can manually turn off all the K jobs for as long as you want by changing the variable to off. G When you want to run the jobs again, simply change the variable to anything but off.E - Status variables - A status can be displayed B using variables which change in the MOTIF display. Every time a H variable is changed all monitor displays are notified and the display
updated.
< 3.1.3 Syntax of job interaction
F This section displays the syntax that can be used to perform advanced E job interaction in Schedule. There are four list types that 3 can be used in advanced job interaction. These are:
$ | List type | / Allowable constructs |
| Prerequisites list | Job names,IF expression |
| Resource list | !Comment SET variable=expression IF expression THEN WAIT( IF expression THEN SUPPRESS_RUN4 IF expression THEN SET variable=expression* IF FILE_NOT_FOUND THEN expression |
| End action list | !Comment SET variable=expression4 IF expression THEN SET variable=expression |
| Initiates list | Job name, IF expression |