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Stopping a Fluent batch job AND saving the data! Possible?

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Old   April 10, 2000, 03:46
Default Stopping a Fluent batch job AND saving the data! Possible?
  #1
Volker Pawlik
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Hi Fluent Users, sometimes I run Fluent in a batch job, i.e. I use the ability of Fluent to read journal or log files instead of interactive commands by the 'i-' option, the option of switching off gaphics '-g' and the display diversion function ('>') of UNIX. This gives me the opportunity to have a look on the progress of the calculation from a remote login.

Unfortunately it happens sometimes that the number of iterations was set to high in order to have finished next morning. This leads to my question:

Does someone know how to stop a fluent process / fluent batch job AND to save the data, i.e. not to loose the results of one night or a weekend? Sometimes kill -1 on the cortex process works. Fluent then writes the case as #FLUENT# and the data as #FLUENT#.dat.

Thank you already for answering.
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Old   April 10, 2000, 22:57
Default Re: Stopping a Fluent batch job AND saving the data! Possible?
  #2
Chetan Polavaram
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Hi,

In the journal file you can add statements such that the fluent files are saved after a specified number of iterations after which iterations are resumed again. Example of a .jou file to run test.cas two times with 20 iterations each time.

file

read-case-data

test.cas

/solve

iterate

20

quit

/file

write-case-data

y

/solve

iterate

20

quit

/file

write-case-data

y

quit

quit

exit

This saves the case after 20 iterations and resumes iterating again. So if you need to run more iterations change the number of iterations or save and iterate a couple of times by copying the portion and pasting where necessary.

iterate

20

quit

/file

write-case-data

y where required.

Chetan
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Old   April 14, 2000, 11:22
Default Re: Stopping a Fluent batch job AND saving the data! Possible?
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Anders Jerhamre
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To check your job (i.e. to save and continue the run) create a file named check-fluent in your /tmp directory.

To save and exit, create a file named exit-fluent .

This should work if you don't run through any queue system. Queue systems normally have the check-batch-job option and this is what I have to use right now.

Anders
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Old   April 17, 2000, 06:01
Default Re: Stopping a Fluent batch job AND saving the data! Possible?
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Volker Pawlik
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How do I have to create those files?
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Old   April 25, 2000, 03:39
Default Re: Stopping a Fluent batch job AND saving the data! Possible?
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Anders Jerhamre
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Use the command touch exit-fluent which creates a file named exit-fluent without any content.
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Old   May 10, 2000, 03:30
Default Re: Stopping a Fluent batch job AND saving the data! Possible?
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Volker Pawlik
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Where does fluent save the data+case file? Into my tmp-directory?
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Old   May 10, 2000, 10:49
Default Re: Stopping a Fluent batch job AND saving the data! Possible?
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Volker Pawlik
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No answers necessary, I found it out by myself: Inside the working directory form where the job was submitted a dat and cas file whose name includes the actual number of iterations is saved.

Very nice! Thanks a lot Anders Jerhamre.
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Old   May 22, 2014, 22:30
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Svetlana Tkachenko
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need to save data and stop fluent; autosave is not enabled. looking for guides / tutorials
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Old   November 26, 2019, 04:14
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Carles Sagués Mitjana
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Dear experts,

Submitting FLUENT 19.1 jobs on PBS qeueing system with scripts.
Is there a way to stop ongoing simulation and save .dat file?

I have tried creating a file in the same folder as the out.log file gets updated.
File names used:
exit-fluent (as suggested in http://jullio.pe.kr/fluent6.1/help/html/ug/node62.htm)
checkpoint-exit (but I think this works for SGE queueing system)

but job still runs...

Any ideas?

Regards,
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Old   November 26, 2019, 12:22
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Lucky Tran
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The check-fluent trick should work still on PBS, it's not SGE specific. Make sure you put it in the right place though. Are you able to find the cleanup file in the same dir?


If you are running Fluent thru workbench, the location might be different (where the .set file is).
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Old   November 27, 2019, 08:28
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Carles Sagués Mitjana
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LuckyTran,

Working outside of Workbench.
Job is splitted on several compute nodes.
I create the files (tried with check-fluent and exit-fluent) where a file named
cleanup-fluent-***.sh is written and where I am able to follow the out.log evolution...
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