Talend Studio: What is the difference between OnSubjobOK and OnComponentOK?

[TalendSolutionExpert]

Answer

OnSubjobOK and OnComponentOK are trigger links, which can link to another subjob. The main difference between them lies in the execution order of the linked subjob.

• With OnSubjobOK, the linked subjob starts only when the previous subjob completely finishes.
• With OnComponentOK, the linked subjob starts when the previous component finishes.

What is a subjob?

A subjob is a self-contained subset of a larger Job, composed of components and links.

The following diagram shows a Job with three subjobs:

The execution order of subjobs linked by OnComponentOK is within the execution cycle of the previous subjob. In this example, subjob 2 starts when tLogRow_1 finishes; subjob 3 starts when both subjob 1 and subjob 2 end, because subjob 2 runs within the execution cycle of subjob 1.

Only the first component of a subjob can use the OnSubjobOK link.