The JS7 - Fork / Join Instruction is used to execute jobs in parallel within a workflow. he Fork Instruction allows to create a number of parallel Branches including further instructions and jobs. When an order is executed in a workflow then it spawns child orders for the branches and waits for their completion. Only after completion of child orders the parent order will continue with the Join Instruction.

Workflow

The jdForkNested workflow contains nested branches each including a number of jobs. Jobs in parallel branches are executed in parallel.

1. Click the folder 02_ParallelExecution and expand the jdFork workflow.
   
   
   
   
   
2. Click the action menu of the workflow and click Add Order from the drop-down menu to add an order to the workflow.
   
   
   
   
   
3. When clicking Add Order a popup window will appear. 
4. You can add the Order ID or leave the Order ID value empty, it will then use a default Order ID. Click the Submit button. 
   
   
   
   
   
5. To check the status of the order click the name of the workflow. This makes the Order History panel appear. 
   
   
   
   
   
6. From the Order history panel you can verify if the order is successful and finished. Click the Order ID to see log output created by jobs executed for this order.
   
   
   
   
   
7. A log view window will open and the order log will be displayed. This log contains output to stdout/stderr from all jobs executed by the order. 
8. You can download the log file by clicking the Download button from the upper right corner of the log view window. Also, you can expand and collapse the individual job output using the chevron buttons from the left upper corner of the log view window.