topic Re: Running two sub jobs parallel in Talend Studio

Running two sub jobs parallel

Anonymous — Wed, 17 Apr 2013 06:32:19 GMT

Hi ,
PLease let me know how I can run two jobs parallel in talend job?

Thanks and Regards,
Biswajit

Re: Running two sub jobs parallel

Anonymous — Wed, 17 Apr 2013 07:28:47 GMT

Hi,
Which components do you used in your subjob and the connection between component is what? If you use iteration connection, you can set an Iterate link to run parallel iterations. Please see the reference https://help.talend.com/pages/viewpage.action?pageId=11973280#Raa30748

Best regards
Sabrina

Re: Running two sub jobs parallel

Anonymous — Wed, 17 Apr 2013 07:33:25 GMT

Hi Sabrina,
I have two sub jobs, Say one is doing the socket connection and other is doing extract from teradata using fastExport.
I want to run this two job parallel.
In previous version we have a component name as tParallelize but for TOS 5.2 it seems to be missing.
How can I use that?

Thanks and Regards,
Biswajit

Re: Running two sub jobs parallel

Anonymous — Wed, 17 Apr 2013 07:57:02 GMT

Hi,

I have two sub jobs, Say one is doing the socket connection and other is doing extract from teradata using fastExport.
I want to run this two job parallel.
In previous version we have a component name as tParallelize but for TOS 5.2 it seems to be missing.
How can I use that?

For tParallelize, this component is only available in Talend Enterprise Subscription release, with community version, open the Job view, click Extra tab and check the 'multi thread execution' option.
See the related article How to use the features in the Extra tab
Best regards
Sabrina

Re: Running two sub jobs parallel

Anonymous — Thu, 18 Apr 2013 09:34:58 GMT

Hi Sabrina,
Thanks for the reply.
Can you please give me any example how I can use multithread execution option to run two parallel job.
Any sample job which I can refer to run two sub job parallely using multithread option?
Regards,
Biswajit

Re: Running two sub jobs parallel

Anonymous — Thu, 18 Apr 2013 09:36:11 GMT

Re: Running two sub jobs parallel

Anonymous — Thu, 18 Apr 2013 12:01:13 GMT

Hi,
I have two sub jobs, one is fetching the file from my local disk and showing the result, the other is just extracting data from file.
I want to run this two job parallel. So check the 'multithread execution' option in Extra tab. Is that what you need?
See my screenshot
Best regards
Sabrina

Re: Running two sub jobs parallel

Anonymous — Thu, 25 Apr 2013 15:03:57 GMT

Hi Sabrina,
Thanks for the reply.
I have a scenario when First Subjob completes then only two parallel sub jobs can start.
If I use multithread execution how can I achieve this scenario?
Thanks and Regards,
BIswajit

Re: Running two sub jobs parallel

Anonymous — Thu, 25 Apr 2013 21:00:50 GMT

You need for this use case two jobs. The first job is your mentioned jobs for the start and the second job contains the two subjobs (the blue underlayed areas) which can run in parallel by switching on the parallel execution option as Sabrina shown.

Re: Running two sub jobs parallel

Anonymous — Fri, 26 Apr 2013 04:31:27 GMT

Hi jlolling,
Thanks for the reply.
Can you please share me any sample screen shot for that?
I didn't get how I can make my first sub job as mentioned job for the start?

Regards,
Biswajit

Re: Running two sub jobs parallel

Anonymous — Fri, 26 Apr 2013 07:55:07 GMT

Hi,
I think you should create a Parent job for your First Subjob and then create a Child job for only two parallel sub jobs(use multithread execution in Child job ). So that the scenario when First Subjob completes then only two parallel sub jobs can start can be achieved.
Please see the component reference with related scenario tRunjob. It will be helpful for your job design.
Best regards
Sabrina

Re: Running two sub jobs parallel

Anonymous — Sat, 27 Apr 2013 09:30:58 GMT

Hi Sabrina,
Thanks for the reply.
But the issue with tRunJOb is that if in PArent job I am setting any global variable then how I can get it in my child job?
Please let me know how I can pass global variable values from Parent Job to Child jobs?
Thanks and Regards,
Biswajit

Re: Running two sub jobs parallel

Anonymous — Sat, 27 Apr 2013 09:58:04 GMT

Hi,
The effective scope of a variable is limited to a specific Job, meaning that the variables defined in one Job can't be accessed from other Jobs. If you want to share the same value between different Jobs, you must define context variables in each Job and then pass the value between them.
See the related reference Passing a value from a parent Job to a child Job
Best regards
Sabrina

Re: Running two sub jobs parallel

Anonymous — Sat, 27 Apr 2013 10:54:51 GMT

Thanks for the reply Sabrina.

It proved a Great help to me :-)
I need one more help like Now I want to pass the value from child to parent . How I can do that?
Is there any other approach?

Thanks and Regards,
Biswajit

Re: Running two sub jobs parallel

Anonymous — Sat, 27 Apr 2013 10:57:15 GMT

Hi,
To pass a value from child job parent job, you can use tBufferOutput component, please refer to
https://community.talend.com/t5/Design-and-Development/resolved-How-to-pass-values-from-child-job-to-parent-job/td-p/107981
Let us know if you still need any help!

Best regards
Sabrina

Re: Running two sub jobs parallel

Anonymous — Sat, 27 Apr 2013 11:12:34 GMT

Thanks Again for such a quick reply.
The link which u gave shows how I can pass the variables from Runjob1 to Run job 2. but my issue is how I can get back the status if the sub job run successfully? I want to catch value from my sub job to my Parent Job.

Thanks and Regards,
Biswajit

Re: Running two sub jobs parallel

Anonymous — Sat, 27 Apr 2013 11:26:49 GMT

Hi,
In https://community.talend.com/t5/Design-and-Development/resolved-How-to-pass-values-from-child-job-to-parent-job/td-p/107981, second floor, shong has replied an answer with a related forum https://community.talend.com/t5/Design-and-Development/Passing-context-parameters-in-a-tRunJob/td-p/66305, which is the key one I want to show you.
If you still don't understand it after reading the related forum, I will design a demo job and send the job .zip file to you, don't be worried about it.
Best regards
Sabrina

Re: Running two sub jobs parallel

Anonymous — Sun, 28 Apr 2013 10:48:48 GMT

Hai Sabrina,
Thanks for reply and help.
Can you please share me the demo job. I am still unable to get the output back to parent job from child job.

Thanks and Regards,
Biswajit

Re: Running two sub jobs parallel

Anonymous — Sun, 28 Apr 2013 11:06:38 GMT

Hi,
Returning a value from child job to parent job
We will read data from a text file as below in a child job. And populate the total number of rows and pass it to the parent job.
in.txt:
id;name
1;Shong
2;Ross
3;Patrick
First Step
Create a job: let's call it 'ChildJob'. The job design looks like pic1)
The components' settings are as below(pic2,3,4)
Second Step
Create a job: let's call it 'ParentJob'. The job design (as below) is called the child job 'ChildJob' on tRunJob_1(pic5)
tJavaRow's setting(pic6)
code on tJavaRow:

System.out.println("The total number of rows is:"+input_row.nb_line);

Third Step
Execute the job; The console has the following output result:
1|Shong
2|Ross
3|Patrick
The total number of rows is:3
Summary
Through the example above, we can see that the most important technical point is using a tBufferOutput component in child job to buffer the records. tRunJob will read the records from the buffer and transfer them to the next component.
Hope it will be helpful for you!
Best regards
Sabrina

Re: Running two sub jobs parallel

Anonymous — Sun, 28 Apr 2013 11:16:15 GMT

Hi Sabrina,
Thanks again for quick reply.
Can you please share me the bigger images . They are smaller so they are not clearly visible.
anyways Thanks again.

Regards,
Biswajit