Xi Software Ltd - Xi-Batch

Batch & Print Management for UNIX & Linux systems

Xi-Batch - Chaining

Another frequent requirement is to "chain" jobs together, so it is guaranteed that they run in thee correct sequences. This is much preferable to guessing arbitrary start times for jobs.

This is again implemented using a variable.

Create a variable, say chain with initial value "A".
Give the first job a condition that it can only start with chain="A".
Give the second job a condition that it can only start with chain="B"
Give the first job an assignment that when it finishes successfully it sets the value to "B".
Give the second job an assignment that when it finishes successfully it sets the value to "A".

In this way the first job will run when required and will set the variable to "B" so the second job can run. Then "B" resets the variable back to "A".

Networked computers

As before, the jobs and variables may be made accessible across the network so that jobs across various computers may be chained.

Browse On...

Click here to go to the next stop on the tour.

Click here to go back to the previous stop on the tour.

Click here to return to the start of the tour.