topic Re: Reg: tBufferInput and tBufferOutput in Talend Studio

Reg: tBufferInput and tBufferOutput

Anonymous — Sat, 16 Nov 2024 13:25:32 GMT

Hi,
If I design my job like below. How many times will father jobs reads the source? 1 time or 6 times?

child job :
tOracleInput-->tMap-->tBufferOutput
father job 1:
tRunJob(run the child job)--->tMap--tfilerRow--tMap--tOracleOutput
father job 2:
tRunJob(run the child job)--->tMap--tfilerRow--tMap--tOracleOutput
father job 3:
tRunJob(run the child job)--->tMap--tfilerRow--tMap--tOracleOutput
father job 4:
tRunJob(run the child job)--->tMap--tfilerRow--tMap--tOracleOutput
father job 5:
tRunJob(run the child job)--->tMap--tfilerRow--tMap--tOracleOutput
father job 6:
tRunJob(run the child job)--->tMap--tfilerRow--tMap--tOracleOutput

To my understanding whenever my father jobs getting executed, child job executed first.
If my 6 father jobs are using same child jobs at same time, it means my child job executed 6 times, which is nothing but reading the same source 6 times. Am I right?
I don't know how it works in Talend. Expecting some replies for this post
Thanks
Naju

Re: Reg: tBufferInput and tBufferOutput

Anonymous — Thu, 20 May 2010 04:33:14 GMT

Hello Naju
In your case, the child job is executed 6 times, because you are using 6 tRunJob to call the child job 6 times. If you want the child job only executed one time and read the same source 6 times, using 1 tBufferOutput in the father job to store the source into memory and 6 tBufferInput to read the same source, the job looks like:
child job :
tOracleInput-->tMap-->tBufferOutput
father job:
tRunJob(run the child job)-->tBufferOutput_1
|
onsubjobok
|
tBufferInput_1--->tMap--tfilerRow--tMap--tOracleOutput
|
onsubjobok
|
tBufferInput_2--->tMap--tfilerRow--tMap--tOracleOutput
|
onsubjobok
|
tBufferInput_3--->tMap--tfilerRow--tMap--tOracleOutput
|
onsubjobok
|
tBufferInput_4--->tMap--tfilerRow--tMap--tOracleOutput
|
onsubjobok
|
tBufferInput_5--->tMap--tfilerRow--tMap--tOracleOutput
|
onsubjobok
|
tBufferInput_6--->tMap--tfilerRow--tMap--tOracleOutput
Best regards
Shong

Re: Reg: tBufferInput and tBufferOutput

alevy — Mon, 07 Jun 2010 01:15:16 GMT

Or use one tBufferInput and then tReplicate

Re: Reg: tBufferInput and tBufferOutput

Anonymous — Wed, 09 Feb 2011 09:05:31 GMT

It's possible to call a subjob that starts with a tBufferInput like this?
father job:
tRunJob(run the child job)-->tBufferOutput_1
|
onsubjobok
|
tRunJob(start with tBufferInput component)-->tLogRow_1

Re: Reg: tBufferInput and tBufferOutput

Anonymous — Wed, 09 Feb 2011 09:14:37 GMT

Hi
No, it is impossible, to pass flow from father job to child job, you need use context variables, see
https://community.talend.com/t5/Design-and-Development/Passing-context-parameters-in-a-tRunJob/td-p/66305
or use joblet feature in Talend Integration Suite.
Best regards
Shong

Re: Reg: tBufferInput and tBufferOutput

Anonymous — Wed, 09 Feb 2011 09:57:16 GMT

Could be an alternative call the subjob as an inline job?
What I want to say with this, is to drag the job from repository list to the designer.
There will be a difference between inline job mode and this?
Thanks in advance.

Re: Reg: tBufferInput and tBufferOutput

Anonymous — Thu, 10 Feb 2011 06:42:37 GMT

Hi
Yes, you can drag the joblet from palette to the designer as you drag a component. The joblet works as a part of main job.
Best regards
Shong