The document describes the scheduling flow of jobs in a pipelined system. It shows the scheduling of 5 jobs (JOB0 to JOB4) based on certain conditions. The jobs have multiple steps that need to complete with specific condition codes for the next job to be scheduled. For example, JOB1 can only be scheduled after STEP01 of JOB0 completes with a condition code of 0. The scheduling aims to keep the pipeline full by scheduling the next job as soon as the conditions allow.

1. zJOS/Puspa© Pipelined Scheduling Flow An animated illustration

2. Schedule Plan step01 step02 JOB0 JOB3 JOB4 step31 step32 JOB1 JOB2 JOB5 step41 step42 step43 step11 step12 step13 step21 step22 step23 step51 step52 step53 MSG1 MSG2 CC=0 CC<4 CC=0 CC<8 CC=0 CC<4 CC=0 CC>4 ABEND

3. Schedule Plan Schedule JOB0 at TOD1 Schedule JOB1 soonest: STEP01 of JOB0 is ended with CC=0 Schedule JOB2 soonest the following condition is met: STEP11 of JOB1 end with CC=4 and message MSG1 occurres Schedule JOB3 soonest the following condition is met: STEP02 of JOB0 end with CC=0 and STEP12 of JOB1 end with CC<8 Schedule JOB4 soonest the following condition is met: STEP13 of JOB1 end with CC<4 or STEP21 of JOB2 end with CC=0, but STEP31 of JOB3 must end with CC=0 and either one is true; message MSG2 occurres or TOD2 reach Schedule JOB5 when either one is true; STEP13 of JOB1 abend or STEP23 of JOB2 end with CC>4.

4. Whatch Out The following slides are animated, wait each slide until the sign below is occurred, then click to continue

5. step01 JOB0 CC=0 step01 step02 step11 CC=0 CC<4 step02 step11 step12 JOB1

6. step11 step12 step21 MSG1 CC<4 step01 step02 JOB0 CC=0 CC=0 JOB1 JOB2

7. step11 step12 step21 MSG1 CC<4 CC<8 step01 step02 JOB0 CC=0 CC=0 step12 step13 CC=8 step21 step31 ??? CC=8 step22 CC<4 step13 JOB1 JOB1 JOB2 JOB3

8. step31 step21 step22 MSG1 CC<4 CC<8 CC=8 CC<4 CC=0 step01 step02 JOB0 CC=0 CC=0 step11 step12 step13 step31 step32 step22 step23 MSG2 step41 JOB3 JOB1 JOB2 JOB4

9. step31 step32 step41 step21 step22 step23 MSG1 MSG2 CC<4 CC<8 CC=8 CC<4 CC=0 step01 step02 JOB0 CC=0 CC=0 step11 step12 step13 step32 step41 step42 JOB3 JOB3 JOB4 JOB1 JOB2

10. step31 step32 step41 step42 step21 step22 step23 MSG1 MSG2 CC<4 CC<8 CC=8 CC<4 CC=0 CC>4 step01 step02 JOB0 CC=0 CC=0 step11 step12 step13 ABEND step23 step51 step42 step43 step51 step52 step43 step52 step53 step53 JOB5 JOB4 JOB2 JOB3 JOB4 JOB1 JOB2 JOB5

11. step41 step42 step43 step51 step52 step53 MSG1 MSG2 CC<4 CC<8 CC=8 CC<4 CC=0 CC>4 ABEND step01 step02 JOB0 CC=0 CC=0 step11 step12 step13 step31 step32 step21 step22 step23 JOB3 JOB4 JOB1 JOB2 JOB5

12. MSG1 MSG2 CC<4 CC<8 CC=8 CC<4 CC=0 CC>4 step01 step02 JOB0 CC=0 CC=0 step11 step12 step13 step31 step32 step21 step22 step23 step41 step42 step43 step51 step52 step53 JOB3 JOB4 JOB1 JOB2 JOB5

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