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In the previous exercise, we showed how ecflow provides simple load management.

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• Excessive disk/io in job generation
• Server busy in job generation, and slow to respond to the GUI.
• Overload queuing systems like PBS/SLURM

Hence we need a load management that can limit the number of submissionsubmissions. When the Job becomes active the limit token is released.

This exercise shows the use of '-s' option. Which helps to control the number of tasks in the submitted state.

We can have more than 2 active jobs , since we only control the number in the submitted state.

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Here is the simple illustration that modifies the previous example:

Text

Let us modify our suite definition file:

# Definition of the suite test.
suite test
 edit ECF_INCLUDE "$HOME/course"
 edit ECF_HOME    "$HOME/course"
 limit l1 2
 family f5
     inlimit -s l1 # by default consume 1 token from the limit l1
     edit SLEEP 20
     task t1
     task t2
     task t3
     task t4
     task t5
     task t6
     task t7
     task t8
     task t9
 endfamily
endsuite

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1. Edit the changes
2. Replace the suite definition
3. In ecflow_ui , observe the effects
4. Change the value of the limit and inlimit, observe the effect.

   
          

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